Track Awesome Dotnet Updates Daily

A collection of awesome .NET libraries, tools, frameworks and software

🏠 Home · 🔍 Search · 🔥 Feed · 📮 Subscribe · ❤️ Sponsor · 😺 quozd/awesome-dotnet · ⭐ 17K · 🏷️ Platforms

[ Daily / Weekly / Overview ]

May 29, 2023

API

• Cloud Storage (⭐32):- This library provides a universal interface for accessing and manipulating data in different cloud blob storage providers (Azure Storage, AWS S3, Google Cloud Storage. It makes it easy to switch between providers or to use multiple providers simultaneously, without having to learn and use multiple APIs.

May 26, 2023

Event aggregator and messenger

• EventFlow (⭐2.2k) - EventFlow is an Async/await first CQRS and Event Sourcing DDD framework for .NET

Graphics

• VectSharp (⭐87) - .NET library to create vector graphics and text, and then export it to PDF, SVG and raster image formats.

Image Processing

• ImageWizard (⭐35) - Image processing webservice based on ASP.NET Core and ImageSharp / SkiaSharp / SvgNet / DocNET

• SimpleITK - A simplified path to Insight. Open-source multi-dimensional image analysis in Python, R, Java, C#, Lua, Ruby, TCL and C++. Developed by the Insight Toolkit community for the biomedical sciences and beyond.

ORM

• EFCore.BulkExtensions (⭐3.1k) - Entity Framework Core Bulk Extensions for super fast (BulkCopy) CRUD ops + SaveChanges on multiple DBs: SQL, PG, My, Lite.

Tools

• Another Redis Desktop Manager (⭐26k) - A faster, better and more stable redis desktop manager [GUI client], compatible with Linux, Windows, Mac. What's more, it won't crash when loading massive keys.

Source Generator

• dotnet-console-games (⭐527) - Game examples implemented in .NET console applications.

Apr 11, 2023

IoC

• Microsoft.Extensions.DependencyInjection (⭐12k) - The default IoC container for NET applications.

OpenAI

• Cledev.OpenAI (⭐51) - .NET SDK for OpenAI which includes ChatGPT, DALL-E and Whisper APIs and a Blazor Server playground.

Mar 03, 2023

Visual Studio Plugins

• SonarSource.sonarlint-visualstudio (⭐409) - SonarLint is a free, open source Visual Studio 2017, 2019 and 2022 extension that provides on-the-fly feedback to developers on new bugs and quality issues in C#, VB.NET, C/C++, TypeScript and JavaScript.

Source Generator

• M31.FluentAPI (⭐35) - Effortlessly generate fluent APIs for your C# classes.

Feb 19, 2023

Code Analysis and Metrics

• PVS-Studio - PVS-Studio is a static analyzer on guard of code quality, security (SAST), and code safety. [Free for OSS] [$]

Feb 16, 2023

Serialization

• FluentSerializer (⭐18) - A profile-based Serializer for multiple data-formats.

Feb 15, 2023

Blazor

• blazork8s (⭐101) - k8s management ui in blazor and .NET Core.

Code Analysis and Metrics

• Bencher - Suite of continuous benchmarking tools designed to catch performance regressions in CI.

Source Generator

• ASP.NET Core Developer Roadmap - A complete guide to become a ASP.NET Developer.

Feb 07, 2023

Database

• SliccDB (⭐77) - Lightweight Embedded (In-Memory) Graph Database for .net

Database Drivers

• FluentStorage (⭐74) - A polycloud .NET cloud storage abstraction layer originally known as Storage.Net. Provides a generic interface for Blob storage (AWS S3, GCP, FTP, SFTP, Azure Blob/File/Event Hub/Data Lake) and Messaging (AWS SQS, Azure Queue/ServiceBus).

Feb 04, 2023

HTTP

• Apizr (⭐104) Refit based web api client, but resilient (retry, connectivity, cache, auth, log, priority, etc...).

Jan 10, 2023

Caching

• LazyCache (⭐1.6k) - A simple, developer friendly, in-memory thread-safe caching service. It leverages Microsoft.Extensions.Caching and Lazy to provide performance and reliability in heavy load scenarios.

Testing

• SecTester (⭐1) - SecTester is a new tool that integrates Bright enterprise-grade scan engine directly into your integration or e2e tests. [Proprietary] [Free]

Jan 04, 2023

GraphQL

• ZeroQL (⭐169) - high-performance C#-friendly GraphQL client. It supports Linq-like syntax. It doesn't require Reflection.Emit or expressions. As a result, the runtime provides performance very close to a raw HTTP call.

Dec 22, 2022

IDE

• • CSharp Analyzer by MongoDB (⭐8) A free Visual Studio Extension for MongoDB users, helping translate your code into MongoDB queries

Dec 19, 2022

IDE

• vvvv A visual live-programming environment for .NET [Free for OSS]

Dec 15, 2022

Testing

• Testcontainers (⭐2.8k) - A library to support tests with throwaway instances of Docker containers for all compatible .NET Standard versions.

Dec 11, 2022

Mathematics

• Jodo.Numerics (⭐11) - Provides extra number types (such as fixed-point and non-overflowing numbers) with full support for operators, math, string-parsing etc. Extensively tested, and cross-platform compatible.

Oct 28, 2022

Database

• RocksDB (⭐105) - C# binding for Facebook's RocksDB Key-Value store + native builds for Windows, macOS and Linux

Oct 27, 2022

Emulators

• Blzhawk (⭐1.7k) - BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.

• Ryujinx (⭐23k) - Experimental Nintendo Switch Emulator written in C#

Image Processing

• MagicScaler (⭐462) - High-performance image processing pipeline for .NET, focused on making complex imaging tasks simple.

Oct 19, 2022

Template Engine

• Handlebars.Net (⭐1k) - A real .NET Handlebars engine

Oct 18, 2022

Template Engine

• SmartFormat (⭐942) - A lightweight text templating library written in C# which can be a drop-in replacement for string.Format

Oct 17, 2022

Template Engine

• Fluid (⭐1.1k) - Fluid is an open-source .NET template engine based on the Liquid template language.

Oct 16, 2022

Books

• .NET in Action, Second Edition - An introduction to implementing full-featured, cross-platform professional applications on the Microsoft .NET platform. [$]

• ASP.NET Core in Action, Third Edition - Build professional-grade full-stack web applications using C# and ASP.NET Core. [$]

• C# in Depth, Fourth Edition - deep dive into the details of the C# language. [$]

• CLR via C#, Fourth Edition - Dig deep and master the intricacies of the common language runtime, C#, and .NET development. [$]

• Functional Programming in C#, Second edition - Real world examples and practical techniques for functional programming in C# without the jargon and theory. [$]

• Microservices in .NET Core, Second edition - A comprehensive guide to building microservice systems using the .NET stack. [$]

Oct 04, 2022

Books

• .NET Maui in Action - A book about creating mobile and desktop apps using a common set of .NET tools. [$]

• ASP.NET Core Security - A practical and hands-on guide to securing web applications built with ASP.NET. [$]

• Blazor in Action - A guide to building UIs and client-side applications using C# and .NET. [$]

• Building Web APIs with ASP.NET Core - Practical beginner’s guide to creating your first web APIs using ASP.NET Core. [$]

• Code Like a Pro in C# - Build on your existing programming skills and upskill to professional-level C# programming. [$]

• Dependency Injection in .NET - teaches you to use Dependency Injection to reduce hard-coded dependencies between application components in .NET. [$]

• Entity Framework Core in Action - teaches how to use Entity Framework Core, including lighter weight data access alternatives such as Dapper. [$]

• Pro .NET 5 Custom Libraries - Consists of sample projects for each data type implementation. Demonstrates implementation in C#. Covers dos and don'ts of each implementation. [$]

• Pro .NET Memory Management - Takes a deep dive into .NET memory management, including comprehensive coverage of how .NET memory works, implementation details, possible pitfalls, and ways to work around them. [$]

Sep 18, 2022

Misc

• SystemTextJson.JsonDiffPatch (⭐50) - High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format.

Aug 26, 2022

Template Engine

• Morestachio (⭐46) - A full sized {{mustache}} like template engine with focus on extendibility.

Aug 24, 2022

Database

• ZoneTree (⭐182) - Persistent, high-performance, transactional, and ACID-compliant ordered key-value database for .NET.

Aug 23, 2022

Testing

• NetArchTest (⭐892) - A fluent API for .Net Standard that can enforce architectural rules in unit tests.

Aug 16, 2022

GraphQL

• GraphQL.NET (⭐5.5k) - Implementation of Facebook's GraphQL (⭐14k) in .Net

• HotChocolate (⭐4.4k) - GraphQL server compatible to all GraphQL compliant clients like Strawberry Shake, Relay, Apollo Client, and various other clients and tools.

• graphql-net (⭐887) - GraphQL to IQueryable for .NET.

• EntityGraphQL (⭐325) - library to build a GraphQL API on top of data model with the extensibility to easily bring multiple data sources together in the single GraphQL schema (EF is not a requirement - any ORM working with LinqProvider or an in-memory object will work).

Jul 31, 2022

Code Analysis and Metrics

• WebBen (⭐9) - Is a tool for benchmarking your Hypertext Transfer Protocol (HTTP) server.

Jul 27, 2022

Queue

• SlimMessageBus (⭐362) - Lightweight message bus with transports for popular messaging systems (Kafka, Redis, Azure Service Bus, and others) and in-memory communication.

Jul 19, 2022

Algorithms and Data structures

• Akade.IndexedSet (⭐21) - A convenient data structure supporting efficient in-memory indexing and querying, including range queries and fuzzy string matching.

Books

• Pro .NET Benchmarking - Provides an in-depth look at software benchmarking for accurate performance measurement. Helps you get maximum performance impact by identifying and targeting the right bottlenecks. Includes coverage of the latest compilers and processors. [$]

• Pro .NET Framework with the Base Class Library - Shows valuable tips and examples that reinforce the correct use of manage types, including how to avoid boxing/unboxing and better use of memory resources. [$]

• Pro ASP.NET Core 6 - The most comprehensive coverage available on ASP.NET Core 6 in full-color. Detailed explanations and plenty of working code to learn new functionality. Provides a fully functioning ASP.NET Core 6 application that can be used as a template for projects. [$]

• Pro Microservices in .NET 6 - Shows you how to get up to speed with .NET 6, Docker, and microservices. Teaches you how to leverage microservice design patterns to strengthen an application. Provides environment options for orchestrators and Azure Kubernetes Service. [$]

Jul 16, 2022

Testing

• Moq.Contrib.HttpClient (⭐176) - A set of extension methods for mocking HttpClient and IHttpClientFactory with Moq.

Jun 22, 2022

RPC

• gRPC UI (⭐4.1k) - gRPC UI is a command-line tool that lets you interact with gRPC servers via a browser. It's sort of like Postman, but for gRPC APIs instead of REST.

Jun 21, 2022

RPC

• gRPCurl (⭐8.7k) - gRPCurl is a command-line tool that lets you interact with gRPC servers. It's basically curl for gRPC servers.

Serialization

• F# Data - F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data

Jun 19, 2022

RPC

• BloomRPC (⭐8.9k) - BloomRPC aims to provide the simplest and most efficient developer experience for exploring and querying your GRPC services.

Jun 18, 2022

RPC

• gRPC (⭐3.6k) An RPC library and framework for .NET Core. Read more about it on Docs Microsoft

• CoreRPC (⭐72) - Extensible library for WCF-like RPC targeting netstandard1.3. Compatible with .NET, Mono and .NET Core.

Jun 12, 2022

API

• WTelegramClient (⭐566) - Automate a user account on Telegram, using the latest version of Telegram Client API

Jun 06, 2022

Blazor

• Megabit.Blazorise (⭐2.8k) - Blazorise is a component library built on top of Blazor and CSS frameworks like Bootstrap, Bulma and Material. Very easy to use.

Jun 03, 2022

Books

• ASP.NET Core Web API - A book about designing and implementing APIs using the REST and GraphQL standards. [$]

Jun 01, 2022

Cryptography

• Paseto.Core (⭐73) - A Paseto (Platform-Agnostic Security Tokens) implementation for .NET

May 29, 2022

Source Generator

• Supernova.Enum.Generators (⭐104) - A C# source generator to create an enumeration class from an enum type. With this package, you can work on enums very, very fast without using reflection.

May 25, 2022

PDF

• Kevsoft.PDFtk (⭐23) - A wrapper to drive the awesome pdftk binary, which can fill PDF forms, get field information, concatenate multiple documents or pages, split documents, add or replace stamps, and can attach files to or download files from pages.

May 24, 2022

Scheduling

• NCrontab.Scheduler (⭐10) - Simple task scheduler library for scheduling NCrontab-based tasks

Feb 22, 2022

Cryptography

• CryptoNet (⭐53) - .NET simple crypto library. Native c#.

Image Processing

• PixelViewer (⭐96) - Cross-platform (Windows/macOS/Linux) image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it. 10/16-bit YUV and viewing image frame sequence are also supported (v1.99+).

Feb 20, 2022

CLI

• Appccelerate - Command Line Parser - A command-line parser with fluent definition syntax, different argument types, required and optional arguments, value restrictions, aliases, type conversion and semi-automatic usage help message composition

Machine Learning and Data Science

• F# Data (⭐768) - F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data

Testing

• xBehave.net (⭐383) - An xUnit.net extension for describing your tests using natural language.

Feb 08, 2022

CMS

• Squidex (⭐1.9k) - Open source headless CMS and content management hub. https://squidex.io

Regular Expression

• RegExtract (⭐678) - Clean & simple idiomatic C# RegEx-based line parser that emits strongly typed results.

Tools

• UnitsNet (⭐1.9k) - Makes life working with units of measurement just a little bit better.

Jan 06, 2022

Database Drivers

• Stowage (⭐129) - Bloat-free zero dependency .NET cloud storage kit that supports at minimum THE major cloud providers.

Dec 29, 2021

Git Tools

• Husky.Net (⭐417) - Git hooks made easy with Husky.Net internal task runner, You can use it to lint your commit messages, run tests, lint code, etc... when you commit or push. supports C# scripts, gitflow hooks, Multiple file states (staged, lastCommit, glob)

Dec 27, 2021

Tools

• CSharpier (⭐664) - An opinionated code formatter for c# that is based on the Prettier (⭐46k) printing process.

Dec 21, 2021

Books

• ASP.NET Core Razor Pages in Action - A comprehensive guide to how to use Razor Pages to create dynamic websites that are easy to test and scale. [$]

Logging

• ULogViewer (⭐105) - Cross-Platform (Windows/macOS/Linux) Universal Log Viewer which supports reading and parsing various type of logs. You can also define your own profile to parse and show logs.

Dec 17, 2021

Blazor

• MASA.Blazor (⭐747) - A set of enterprise-class UI components based on Material Design and Blazor WebAssembly.

Dec 10, 2021

Media

• SeeShark (⭐118) - Cross-platform camera library for .NET using FFmpeg supporting over 190 pixel formats

Dec 06, 2021

Reactive Programming

• ObsevableComputations (⭐97) - A cross-platform .NET library for computations whose arguments and results are objects that implement INotifyPropertyChanged and INotifyCollectionChanged (ObservableCollection) interfaces.

Dec 04, 2021

Application Frameworks

• Signals (⭐43) - Signals is a .NET5 based framework which focuses on increasing the quality and productivity within development teams by providing them with tools, aspects and processes.

Serialization

• FlatSharp (⭐411) - Fast, idiomatic FlatBuffers implementation. Use .fbs files or attributes.

Nov 30, 2021

GUI

• UNO Platform - The only platform for building native mobile, desktop and WebAssembly with C#, XAML from a single codebase. Open source and professionally supported. Website: platform.uno

MVVM

• Community Toolkit - Collection of control & helper libraries and samples for various .NET technologies. Contains modern MVVM library, supported by Microsoft. Includes Windows Community Toolkit (⭐5.5k), MAUI Community Toolkit (⭐1.5k), and Dotnet Community Toolkit (⭐2.1k).

Nov 13, 2021

Logging

• Sejil (⭐115) - Capture, view and filter your ASP.NET Core app's logs right from your app. It supports structured logging, querying as well as saving log queries.

Oct 25, 2021

Serialization

• ObjectDumper.NET (⭐319) - Serializes in-memory object to C# code.

Oct 24, 2021

Mathematics

• WPF-Math (⭐509) - a .NET library for rendering mathematical formulae using the LaTeX typesetting style, for the WPF framework

Office

• Toxy (⭐311) - .NET text extraction framework supports a few file formats

ORM

• SqlSugar (⭐4.4k) - Another ORM library supports many RDBMS including MySql, SqlServer, Sqlite, Oracle, Postgresql

Oct 23, 2021

JavaScript Engines

• YantraJS (⭐103) - JavaScript Runtime (Similar to NodeJS) for .NET Standard, compiles JavaScript to IL, support for many ES6 features, generators, CommonJS modules, CSX modules and expression compiler.

Misc

• Build Versioning (⭐47) - Simple build versioning for .NET, powered by Git tags

Oct 22, 2021

Testing

• NBomber (⭐1.8k) - Very simple load testing framework for Pull and Push scenarios. It's 100% written in F# and targeting .NET Core and full .NET Framework.

Oct 12, 2021

Game

• osu!framework (⭐1.3k) - A 2D application/game written with amazing games in mind.

Sep 28, 2021

Application Frameworks

• Plastic (⭐42) - Plastic provides encapsulation of things like Domain, Application Rules, Business Rules or Business Logic in Application. For this, Command pattern is used.

Calendar

• Stream (⭐40) Official .NET API client for Stream Chat, a service for building chat applications.

Graphics

• ScottPlot - A plotting library to interactively displays large datasets. Line plots, bar charts, pie graphs, scatter plots, and more. It supports WinForms, WPF, Avalonia, Console.

Sep 21, 2021

Graphics

• LiveCharts2 (⭐2.9k) - Simple, flexible, interactive & powerful charts, maps, and gauges for .Net. LiveCharts2 supports WPF, WinForms, Xamarin, Avalonia, WinUI, UWP.

Sep 07, 2021

Mathematics

• Vim.Math3d (⭐77) - A feature-rich cross-platform replacement for System.Numerics with support for consistent serialization and binary layout, and additional structures and algorithms for efficient 3D Math.

Aug 19, 2021

Game

• FNA (⭐1.8k) - FNA is an XNA4 reimplementation that focuses solely on developing a fully accurate XNA4 runtime for the desktop

Aug 17, 2021

Cryptography

• NaCl.Core (⭐65) - A managed-only cryptography library for .NET which provides modern cryptographic primitives.

Aug 13, 2021

Functional programming

• Curryfy (⭐55) - Provides strongly typed extensions methods for C# delegates to take advantages of functional programming techniques, like currying and partial application.

• MoreLinq (⭐3.3k) - Provides extra methods to LINQ to Objects.

Machine Learning and Data Science

• m2cgen (⭐2.5k) - A CLI tool to transpile trained classic ML models into a native .NET (C#, F# or Visual Basic) code with zero dependencies.

Misc

• RecordParser (⭐163) - Library to help reading and writing CSV and Flat files with zero heap allocation.

Aug 01, 2021

API

• CommandQuery (⭐84) - Command Query Separation for 🌐ASP.NET Core ⚡AWS Lambda ⚡Azure Functions ⚡Google Cloud Functions 🌐ASP.NET Web API 2

Application Frameworks

• silky (⭐245) - The Silky framework is designed to help developers quickly build a microservice development framework through simple code and configuration under the .net platform.

Blazor

• ant-design-blazor (⭐5k) - A set of enterprise-class UI components based on Ant Design and Blazor WebAssembly.

CLI

• Typin (⭐221) - Simple to use declarative framework for interactive CLI applications and command line tools (direct mode) that has its roots in CliFx.

Distributed Computing

• .NEXT Raft (⭐1.2k) - Raft implementation for .NET and ASP.NET Core that allows to build clustered microservices powered by distributed consensus and replication

E-Commerce and Payments

• Adyen (⭐85) - The official Adyen Payment API Library for .NET

Graphics

• Aspose.Drawing - Fully managed, cross-platform, complete 2D graphic library for drawing text, geometries, and images, with System.Drawing compatible API. [$]

Image Processing

• ColorHelper (⭐45) - Useful methods for work with colors.

Interactive programming

• .NET Interactive (⭐2.4k) - .NET Interactive takes the power of .NET and embeds it into your interactive experiences.

Mathematics

• AngouriMath (⭐672) - An open-source symbolic/computer algebra library, made primarily for C# and F#. It covers a range of features and might be considered as an alternative to SymPy in .NET.

Misc

• LINQPad.QueryPlanVisualizer (⭐371) - View SQL Server and Postgres query plans directly inside LINQPad.

MVVM

• EBind (⭐146) - A concise, fast and feature-rich .NET data binding solution.

Networking

• SharpPcap (⭐1.1k) - Fully managed, cross platform (Windows, Mac, Linux) .NET library for capturing packets from live and file based devices.

Office

• ShapeCrawler (⭐160) - A fluent API for the processing of PowerPoint presentations without Microsoft Office installed.

• MiniExcel (⭐1.7k) - A micro Excel helper avoids OOM and high performance to create/mapping/template-fill-data.

ORM

• FreeSql (⭐3.7k) - a convenient ORM in dotnet, supports MySql, SqlServer, PostgreSQL, Oracle, Sqlite, Firebird, 达梦, 人大金仓, 神舟通用, 翰高 and Access.

PDF

• PdfPig - Read and create and extract text and other content from PDFs in C# (port of PdfBox)

• QuestPDF - QuestPDF is an open-source, modern and battle-tested library that can help you with generating PDF documents by offering friendly, discoverable and predictable C# fluent API.

Protocols

• Tecan SiLA2 SDK - A library and code generator to develop SiLA2 clients and servers.

Queue

• Silverback - A simple but feature-rich message bus for .NET core (supports Kafka, RabbitMQ and MQTT).

SDK and API Clients

• Cloudmersive APIs - An API client library for .NET [Proprietary][Free]

Testing

• BDTest (⭐67) - A behaviour driven testing and reporting framework!

• CsCheck (⭐85) - Random testing library for C#. Including concurrency, causal profiling, regression and performance testing.

Tools

• JSON Formatter and Validator - A blazing fast JSON formatter and validator that won't share JSON with a server.

Visual Studio Plugins

• Tabs Studio - Visual Studio tab manager with multiple tab rows, tab coloring and tab grouping. [$]

• ViEmu - very powerful Vi/vim emulator for Visual Studio supporting all basic and many advanced features of vi/vim. [$]

• Roslynator (⭐2.7k) - A collection of 500+ analyzers, refactorings and fixes for C#, powered by Roslyn

• Unchase.Odata.Connectedservice (⭐40) - A Visual Studio Connected Service for generating API client code in C# or VB for OData web service.

• Unchase.OpenAPI.Connectedservice (⭐87) - A Visual Studio 2017/2019 extension to generate C# (TypeScript) HttpClient (or C# Controllers) code for OpenAPI web service with NSwag (⭐5.9k).

Jun 26, 2021

Application Frameworks

• Fusion (⭐1.6k) - .NET Core and Blazor library that attempts to dramatically improve the way we implement real-time and high-load services by introducing a novel kind of "computed observables" - immutable, thread-safe, and most importantly, almost invisible for developers. Samples 1 (⭐139) Samples 2 (⭐69)

Caching

• FusionCache (⭐647) - An easy to use, high performance and robust cache with an optional distributed 2nd layer and some advanced features, like a fail-safe mechanism and advanced timeouts management

E-Commerce and Payments

• GrandNode (⭐764) - Headless, multi-vendor, multi-tenant, the most advanced open source e-commerce platform based on .NET Core 5.0 and MongoDB.

Mar 03, 2021

Blazor

• BootstrapBlazor (⭐1.4k) - A set of enterprise-class UI components based on Bootstrap and Blazor.

Misc

• Validot (⭐271) - Validot is a performance-first, compact library for advanced model validation. Using a simple declarative fluent interface, it efficiently handles classes, structs, nested members, collections, nullables, plus any relation or combination of them. It also supports translations, custom logic extensions with tests, and DI containers.

Source Generator

• Awesome Microservices .NET Core (⭐2.3k) - A collection of awesome training series, articles, videos, books, courses, sample projects, and tools for Microservices in .NET Core.

Jan 22, 2021

HTTP

• WebApiClient (⭐1.9k) An open source project based on the HttpClient. You only need to define the c# interface and modify the related features to invoke the client library of the remote http interface asynchronously.

Misc

• Quickenshtein (⭐230) - An extremely quick and memory efficient Levenshtein Distance calculator with SIMD and Threading support

Jan 15, 2021

Caching

• Cache Tower (⭐447) - An efficient multi-layered caching system for .NET (In-Memory, Redis, Database, File etc)

CLI

• CommandDotNet (⭐507) - Model your console app using C# in a composable manner. Define commands with methods. Define subcommands with properties or nested classes. Extensible parsing and command execution.

• CommandLineUtils (⭐2.1k) - This is a fork of Microsoft.Extensions.CommandLineUtils, which is no longer under active development.

CLR

• Runtime (⭐12k) - Mono and CoreCLR .NET runtimes, as well as the standard library and some higher level components like System.Linq and System.Text.Json.

Compilers, Transpilers and Languages

• Amplifier.NET (⭐153) - Write and compile your own kernel function using C# and Amplifier will take care of running it on your favorite hardware. Amplifier allows .NET developers to easily run complex applications with intensive mathematical computation on Intel CPU/GPU, NVIDIA, AMD without writing any additional C kernel code.

DirectX

• Vortice.Windows (⭐818) - Cross platform .NET standard libraries for DirectX, WIC, Direct2D1, XInput, XAudio and X3DAudio

Game

• UnrealCLR (⭐2.6k) - Unreal Engine .NET Core integration

Logging

• Rollbar.NET (⭐63) - Simplifies real-time remote error monitoring while using Rollbar.com. Open-source Rollbar Notifier SDK for any .NET-based technology stack. The SDK that can be used in any application built on the following .NET versions: .NET Core 2.0+, .NET Standard 2.0+, .NET Full Framework 4.5.1+, Mono, Xamarin, and, in general, any implementation of the .NET Standard 2.0+. It simplifies building data payloads based on exception data, tracing data, informational messages, and telemetry data and sends the payloads to the Rollbar API for remote monitoring and analysis of the hosting application's behavior.

• ZeroLog (⭐296) - ZeroLog is a zero-allocation .NET logging library. It provides basic logging capabilities to be used in latency-sensitive applications, where garbage collections are undesirable.

Machine Learning and Data Science

• SciSharp STACK - A rich machine learning ecosystem for .NET created by porting the most popular Python libraries to C#.

• Synapses (⭐66) - An in-memory neural network library written in F#.

Misc

• Infinity Crawler (⭐210) - A simple but powerful web crawler library for .NET

Networking

• NetCoreServer (⭐2k) - Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution (NETStandard).

Object to object mapping

• Mapster (⭐3.6k) - A high performance object mapper in .net

ORM

• MongoFramework (⭐333) - An "Entity Framework"-like interface for MongoDB

Serialization

• CsvExport (⭐129) - Very simple & lightweight CSV exporter, Excel friendly, escapes text & quotes etc.

Strong Naming

• .NET Assembly Strong-Name Signer (⭐302) - Utility software to strong-name sign .NET assemblies, including assemblies you do not have the source code for.

Testing

• Compare-Net-Objects (⭐911) - Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects.

Nov 30, 2020

Algorithms and Data structures

• Towel (⭐658) - data structures, algorithms, mathematics, metadata, extensions, console, measurements, and other useful stuff

GUI

• Ookii.Dialogs.Wpf (⭐885) - Enable WPF applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more

• Ookii.Dialogs.WinForms (⭐452) - Enable Windows Forms applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more

Minification

• CompressedStaticFiles (⭐77) - Send compressed static files to the browser without having to compress on demand, also has support for sending more advanced image formats when the browser indicates that i has support for it.

Tools

• Downloader (⭐814) - Fast and reliable multipart downloader with asynchronous progress events for .NET applications.

Oct 20, 2020

API

• FFImageLoading - Fast & Furious Image Loading (⭐1.4k) - This Library to load images quickly & easily on Xamarin.iOS, Xamarin.Android, Xamarin.Forms, Xamarin.Mac / Xamarin.Tizen and Windows (UWP, WinRT)

Caching

• EasyCaching (⭐1.6k) - A caching library that contains basic and some advanced usages of caching which can help handle caching more easier!

ORM

• Venflow (⭐164) - A super fast and lightweight ORM for PostgreSQL.

Tools

• YARP (⭐6.6k) - YARP is a reverse proxy toolkit for building fast proxy servers in .NET using the infrastructure from ASP.NET and .NET.

Oct 19, 2020

CLI

• spectre.console (⭐7k) - A library that makes it easier to create beautiful console applications.

Distributed Computing

• Orleankka (⭐475) - Orleankka is a functional API for Microsoft Orleans framework. It is highly suitable for scenarios where having composable, uniform communication interface is preferable, such as: CQRS, event-sourcing, re-routing, FSM, etc. Additional API available for F# called Orleankka.FSharp.

Testing

• ArchUnitNET (⭐524) - Simple library for checking the architecture of C# code with a fluent API.

• Snapshooter (⭐233) - A snapshot testing tool for .NET Core and .NET Framework

Oct 02, 2020

GUI

• Bunifu UI Framework - Carefully crafted Winforms controls and components for creating stunning modern application UI. [$]

Sep 21, 2020

Tools

• OctoLinker (⭐5.1k) - Navigate through project.json, packages.config, *.props, *.targets, and C#/F#/VB.NET project files efficiently with the OctoLinker browser extension for GitHub.

Sep 18, 2020

Authentication and Authorization

• Logibit Hawk (⭐37) - A F# Hawk (⭐1.9k) authentication library

Build Automation

• MSBuild (⭐5k) - The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio

Documentation

• Swashbuckle (⭐3.1k) - Seamlessly adds a Swagger to Web API projects.

GUI

• Empty Keys UI - Multi-platform and multi-engine XAML based user interface library [Free][Proprietary]

Internationalization

• ResX Resource Manager (⭐1.1k) - The most popular free tool to localize all kind of applications with resx-based resources.

Interoperability

• pinvoke (⭐2k) - A library containing P/Invoke code for latest Windows OS.

Misc

• Rant (⭐3k) - The Rant Procedural Text Generation DSL

ORM

• Fluent NHibernate (⭐1.6k) - Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.

Package Management

• Cloudsmith - A fully managed package management SaaS, with support for NuGet, Npm, Docker and much more. [Free for Public/OSS] [$]

Reactive Programming

• Dynamic Data (⭐1.5k) - Reactive Extensions (Rx) for collections

Serialization

• ProtoBuf (⭐280) - Generate C# code for protocol buffer serialization from a .proto specification.

Testing

• Verify (⭐1.9k) - Verification tool to enable simple approval of complex models and documents.

Tools

• Open Live Writer (⭐2.4k) - Blog writer which integrated with WordPress, Blogger, et. al. Open Live Writer makes it easy to write, preview, and post to your blog.

• Papercut (⭐2.5k) - Papercut is an open source (.NET based) test email viewer that runs locally with a built-in SMTP server designed to receive and notify of test email messages.

• SmartCode (⭐552) - SmartCode = IDataSource -> IBuildTask -> IOutput => Build Everything!!! (Including [Code generator])

UI Automation

• FlaUI (⭐1.6k) - FlaUI is a .NET library which helps with automated UI testing of Windows applications (Win32, WinForms, WPF, Store Apps, ...).

Visual Studio Plugins

• VsVIM (⭐3.5k) - VIM in Visual Studio

Sep 15, 2020

Application Frameworks

• Newbe.Claptrap (⭐212) - This is a set of server-side development frameworks with reactive, event sourcing and Actor pattern as basic theories. On top of this, developers can develop "distributed", "scale out", and "easy to test" application more simply.

Code Snippets

• Sharplab - Run C# code using different branches and versions of Roslyn, see the IL that was produced and examine the JIT's output.

Graphics

• RealTimeGraphX (⭐186) - RealTimeGraphX is a data type agnostic, high performance plotting library for WPF, UWP and soon, Xamarin Forms.

Mathematics

• MKL.NET (⭐67) - A simple cross platform .NET API for Intel MKL.

PDF

• Docotic.Pdf - PDF library to create, read, edit, draw, and print PDF documents in .NET and .NET Core applications. 100% managed, without unsafe blocks. [$] [Free for OSS]

• ITextSharp (⭐1.3k) - iText is a PDF library that allows you to CREATE, ADAPT, INSPECT and MAINTAIN documents in the Portable Document Format (PDF)[$] [Free for OSS]

Sep 14, 2020

Graphics

• Silk.NET (⭐2.8k) - A cross-platform, high-performance, low-level .NET Standard wrapper for many advanced APIs such as OpenGL, OpenCL, OpenAL, OpenXR, Assimp, GLFW, as well as many others. In addition to wrapping over Native APIs, it also comes with its own Windowing and Input abstraction. This makes game and application development with Silk.NET a breeze, and has pretty much everything a 3D application developer would need.

GUI

• Lara (⭐130) - Lara Web Engine is a library for developing Web user interfaces in C#

Template Engine

• Scriban (⭐2.5k) - A fast, powerful, safe and lightweight text templating language and engine for .NET

UI Automation

• PuppeteerSharp (⭐2.7k) - Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API.

• PuppeteerSharp.Contrib (⭐76) - Contributions to Puppeteer Sharp that provides a convenient way to write readable and robust browser tests.

Parser Library

• CSLY (⭐270) - A light embedded C# lexer/parser generator.

Jun 17, 2020

Application Templates

• JHipster.NET (⭐283) JHipster blueprint for replace orginal SpringBoot Backend by asp.net core. The main goal generator of jhipster is showcases best practices of modern web development in java. So the goal of the project is to do the same in .net. The Frontend can be generated with angular or react and soon with blazor.

Deployment

• yuniql (⭐362) - Free and open source schema versioning and migration tool made with .NET Core. Run migrations with plain SQL, arrange versions in ordinary folders and seed your data from CSV via stand-alone CLI (no CLR needed), Azure Pipelines, Docker or ASP.NET Core code. https://yuniql.io

GIS

• DEM Net Elevation API (⭐246) - .Net library for Digital Elevation Models, allows 3D terrain generation in glTF / STL format.

Real-time Communications

• SIPSorcery (⭐1.1k) - A cross platform C# .NET library supporting SIP, VoIP and WebRTC.

May 13, 2020

Calendar

• iCal.NET (⭐678) iCal.NET is an iCalendar (RFC 5545) class library for .NET aimed at providing RFC 5545 compliance, while providing full compatibility with popular calendaring applications and libraries.

Functional programming

• Optuple (⭐24) - .NET Standard Library for giving (bool, T) Option-like semantics in a non-obtrusive way; this is, there is no new option type dependency for a library or its users.

Game

• Devtodev (⭐7) - A full-cycle analytics solution for game developers.

Image Processing

• Imgix-CSharp - Easily update image urls to be fast and responsive. [$]

Misc

• FormHelper (⭐250) - Form & Validation Helper for ASP.NET Core. Form Helper helps you to create ajax forms and validations without writing any javascript code. (Compatible with Fluent Validation)

PDF

• Cloudmersive PDF - Cloudmersive PDF is a native .NET Framework and .NET Core NuGet library and API service that can create, modify, encrypt or convert PDF documents at high scale and fidelity; and is free to use with no expiration [Free]

Apr 24, 2020

ORM

• EntityFramework.Exceptions (⭐829) - Use typed Exceptions for Entity Framework Core when your SQL query violates database constraints in SqlServer, MySql, PostgreSQL or SQLite

Apr 21, 2020

PDF

• Pdfium.Net SDK - Advanced C# PDF library for render, create, edit, merge, split, print, and view PDFs. Open source PDF Viewer is available on GitHub. A NuGet package is also available for easy inclusion into your projects.[$]

Serialization

• Ceras (⭐451) - Ceras is a binary serializer. It converts any object into a byte[] and back. It goes above and beyond in terms of features, speed, and comfort. Supports reference loops, large/complicated inheritance chains, splitting objects into parts and more.

• Protobuf.NET (⭐4.2k) - Protocol buffers is the name of the binary serialization format used by Google for much of their data communications

Testing

• SpecFlow (⭐2.1k) - Binding business requirements to .Net code

• xUnit.net (⭐3.7k) - A free, open source, community-focused unit testing tool for the .NET Framework.

• ReportPortal - AI-powered Test Automation Dashboard. Acquire, aggregate and analyze test reports to ascertain release health.

Apr 20, 2020

Functional programming

• JFlepp.Maybe (⭐4) - A Maybe type for C#, aimed as an idiomatic port of the option type in F# to C#

Game

• Stride Game Engine - Stride Game Engine is a 2D/3D cross-platform game engine featuring a scene editor, particles, physically based rendering (PBR), scripting, and much more

Install tools

• Wix Toolset - The most powerful set of tools available to create your Windows installation experience

Misc

• CSScript - CS-Script is a CLR based scripting system which uses C# as a programming language. CS-Script currently targets Microsoft implementation of CLR (.NET 2.0/3.0/3.5/4.0/4.5) with full support on Mono. Comes with many additional features, such as script hosting.

MVVM

• UpdateControls - Update Controls does not require that you implement INotifyPropertyChanged or declare a DependencyProperty. It connects controls directly to CLR properties. This makes it perfect for the Model/View/ViewModel pattern.

• Toms Toolbox (⭐86) - Visual Composition framework to easily build modularized MVVM applications based on the Managed Extensibility Framework (MEF).

ORM

• SmartSql (⭐956) - SmartSql = MyBatis + Cache（Memory | Redis）+ ZooKeeper + R / W Splitting + Dynamic Repository ....

Protocols

• DnsClient.NET (⭐665) - A simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups.

Visual Studio Plugins

• Web Essentials (⭐53) - Web Essentials extends Visual Studio with lots of new features that web developers have been missing for many years

• SideWaffle (⭐654) - A collection of Item Templates for Visual Studio 2012/2013/2015 that makes any web developer's life much easier

Mar 04, 2020

WebSocket

• Websocket.Client (⭐569) - A multiplatform wrapper over native C# class ClientWebSocket with built-in reconnection and error handling.

Feb 26, 2020

Logging

• Logary (⭐521) - Logary is a high performance, multi-target logging, metric, tracing and health-check library for Mono and .NET. .NET's answer to DropWizard. Supports many targets, built for micro-services.

Mathematics

• ALGLIB - ALGLIB is a cross-platform numerical analysis and data processing library. It supports several programming languages (C++, C#, Delphi) and several operating systems (Windows and POSIX, including Linux) [Proprietary] and [Free Edition]

Misc

• FluentValidation (⭐8.1k) - A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules.

ORM

• Entity Framework 6 (⭐1.4k) - Object-relational mapper that enables .NET developers to work with relational data using domain-specific objects

• Entity Framework Core (⭐13k) - Object-relational mapper that enables .NET developers to work with relational data using domain-specific objects

• MicroLite ORM (⭐86) MicroLite ORM is a micro Object Relational Mapper for the .NET framework. It is designed to be easy to use, extensible and testable.

Feb 25, 2020

Authentication and Authorization

• ASP.NET SAML (⭐285) - SAML authentication support for ASP.NET apps

Feb 12, 2020

Code Analysis and Metrics

• CodeMaid - Visual studio extension to cleanup, dig through and simplify C#, C++, F#, VB, PHP, JSON, XAML, XML, ASP, HTML, CSS, LESS, SCSS, JavaScript and TypeScript coding.

Database

• DBreeze (⭐468) - DBreeze Database is an open-source embedded Key-Value store

Feb 06, 2020

Build Automation

• FlubuCore (⭐853) - A cross platform build and deployment automation system for building projects and executing deployment scripts using C# code.

CLI

• JustCli (⭐25) - That’s just a quick way to create your own command line tool.

Compilers, Transpilers and Languages

• IronScheme (⭐344) - R6RS Scheme compiler, runtime and many standard libraries

• VisualFSharp (⭐3.5k) - The Visual F# compiler and tools

Database

• Event Store (⭐4.9k) - The open-source, functional database with Complex Event Processing in JavaScript

Documentation

• SourceBrowser (⭐962) - Source browser website generator that powers https://referencesource.microsoft.com

E-Commerce and Payments

• SmartStoreNET (⭐2.6k) - Free ASP.NET MVC e-commerce Shopping Cart Solution

Extensions

• ExtensionMethods.Net - Site with collection of extension methods

Feb 05, 2020

CLI

• CliFx (⭐1.3k) - Declarative framework for building command line interfaces.

Database

• StringDB (⭐67) - StringDB is a modular, key/value pair archival DB designed to consume tiny amounts of ram & produce tiny databases.

• Db4o-gpl (⭐27) - Object-oriented database, embedded and remote connections supported.

Event aggregator and messenger

• FluentMediator (⭐176) - FluentMediator is an unobtrusive library that allows developers to build custom pipelines for Commands, Queries and Events

GUI

• Windows UI Library (⭐5.5k) - The Windows UI Library (WinUI) provides official native Microsoft UI controls and features for Windows UWP apps.

Mathematics

• MathNet - Math.NET is an open source initiative to build and maintain toolkits covering fundamental mathematics, targeting advanced but also every day needs of .NET developers

• GeometRi (⭐136) - Simple and lightweight computational geometry library for .Net

Misc

• Hashids.net (⭐3k) - Generate short unique ids from integers, as per https://hashids.org

• NaturalSort.Extension (⭐100) - Extension method for StringComparer that adds support for natural sorting (e.g. "abc1", "abc2", "abc10" instead of "abc1", "abc10", "abc2").

MVVM

• Smaragd (⭐33) - A platform-independent, lightweight library for developing .NET applications using the MVVM architecture.

Office

• GemBox.Bundle - A package of .NET components that enable fast, simple and efficient processing of office files (Excel, Word, PowerPoint, PDF and emails). [$]****[Free Lite versions]

• Outlook Redemption - Library to work with the Outlook Object Model and (Extended) MAPI. Supports Outlook 98 - 2019. Work with objects/mails/accounts/folders in Exchange and Outlook. [$]

ORM

• RepoDb (⭐1.6k) - A hybrid ORM library for .NET.

Profiler

• Unchase.FluentPerformanceMeter (⭐36) - An open-source and cross-platform .Net Standard 2.0 library that is designed for the method’s performance measurement.

SDK and API Clients

• Dropbox.NET (⭐320) - Official .NET SDK for the Dropbox API

Style Guide

• C# Async Guidance (⭐6.5k) - list of problematic asynchronous patterns for .NET Core with an explanation of how to solve those issues

Testing

• Fuchu (⭐122) - A unit-testing library for F# with tests-as-values which makes DSLs extremely easy to create.

Source Generator

• NuGet Trends - Check out NuGet packages adoption and what's trending on NuGet.

Sep 29, 2019

API

• TLSharp (⭐997) - It's a perfect fit for any developer who would like to send data directly to Telegram users or write own custom Telegram client.

Application Frameworks

• HopFramework (⭐50) - HopFramework is a framework to create projects easily applying Domain Driven Design and a lot of patterns to delivery a better solution.

Blockchain

• Nethermind (⭐912) - full Ethereum client in .NET Core

GUI

• HandyControl (⭐4.7k) - Contains some simple and commonly used WPF controls

HTML and CSS

• LtGt (⭐117) - lightweight HTML processor, can be used to parse and navigate DOM, handles CSS selectors, can convert to Linq2Xml, easily extensible, and more.

Image Processing

• Colourful (⭐241) - Open source .NET library for working with color spaces.

Install tools

• Onova (⭐390) - An unopinionated auto-update framework for desktop applications.

Machine Learning and Data Science

• Catalyst (⭐529) Cross-platform Natural Language Processing (NLP) library inspired by spaCy, with pre-trained models, out-of-the box support for training word and document embeddings, and flexible entity recognition models. Part of the SciSharp Stack

Mathematics

• Rationals (⭐62) - Implementation of rational number arithmetic for .NET with arbitrary precision.

Misc

• Coravel (⭐2.6k) Near-zero config .NET Core library that makes Task Scheduling, Caching, Queuing, Mailing, Event Broadcasting (and more) a breeze!

Queue

• Gofer.NET (⭐504) - Easy C# API for Distributed Background Tasks/Jobs for .NET Core. Inspired by celery for python.

Tools

• Mockaco (⭐281) - API mock server with fast setup, useful to simulate HTTP responses, leveraging ASP.NET Core features, built-in fake data generation and C# scripting engine powered by Roslyn scripting API.

• AnyStatus - A desktop notifications app for monitoring CI/CD pipelines, servers, network, health and metrics. AnyStatus supports Azure DevOps, Jenkins, TeamCity, AppVeyor and more.

Source Generator

• .NET Open Source Developer Projects (⭐13k) - This community maintained list showcases .NET open source projects that are useful for any aspect of the development process.

Apr 28, 2019

HTTP

• Flurl - Fluent, portable, testable REST/HTTP client library

Mar 27, 2019

Testing

• NFluent - NFluent is an assertion library which aims to fluent your .NET TDD experience.

Mar 26, 2019

GUI

• AdonisUI (⭐1.5k) - Lightweight UI toolkit for WPF applications offering classic but enhanced Windows visuals.

Mar 21, 2019

Package Management

• Sleet (⭐304) - A NuGet v3 static feed generator with support for AWS S3 and Azure Storage

Mar 18, 2019

E-Commerce and Payments

• NopCommerce (⭐8.1k) - nopCommerce. Free open-source e-commerce shopping cart (ASP.NET Core)

HTTP

• Tiny.RestClient (⭐197) - Simpliest Fluent REST client for .NET.

Mar 17, 2019

Scheduling

• Workflow Core (⭐4.6k) - Lightweight embeddable workflow engine

Mar 15, 2019

API

• Ocelot (⭐7.6k) - .NET core API Gateway

Mar 12, 2019

Interoperability

• Pyrolite (⭐171) - This library allows your Java or .NET program to interface very easily with the Python world. It uses the Pyro protocol to call methods on remote objects.

Mar 05, 2019

API

• ASP.NET Web API - Framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices

• Breeze - API framework enabling rich data access by using the OData 3 protocol. Client libraries available for JavaScript and C#.

Authentication and Authorization

• Stuntman - Stuntman is a library for impersonating users during development leveraging .NET Claims Identity.

CMS

• Piranha CMS - Piranha is the fun, fast and lightweight .NET framework for developing cms-based web applications with an extra bite. It's built on ASP.NET MVC and Web Pages and is fully compatible with both Visual Studio and WebMatrix. https://piranhacms.org

Compilers, Transpilers and Languages

• Hybridizer - CIL (C#, VB.Net, F#) to CUDA compiler. [$]

Compression

• SharpZipLib - a Zip, GZip, Tar and BZip2 library written entirely in C# for the .NET platform

Continuous Integration

• TeamCity - Ready to work, extensible and developer-friendly build server — out of the box [$]

Database

• LiteDB (⭐7.5k) - A .NET NoSQL Document Store in a single data file - https://www.litedb.org

Decompilation

• ILSpy - ILSpy is the open-source .NET assembly browser and decompiler

Markdown Processors

• F# Formatting - Tools for documenting F# and C# projects. The library contains extensible Markdown parser as a core component.

GIS

• OsmSharp - C# library to work with OpenStreetMap (OSM) data. Provides reading, writing and route-planning for OSM data.

Git Tools

• GitExtensions (⭐7k) - GitExtensions is a shell extension, a Visual Studio 2008/2010/2012/2013 plugin and a standalone Git repository tool. https://gitextensions.github.io/

Graphics

• Helix Toolkit - Helix Toolkit is a collection of 3D components for .NET

HTML and CSS

• LibSass Host (⭐80) - .NET wrapper around the libSass library with the ability to support a virtual file system

IDE

• Waf DotNetPad - A simple and fast code editor that makes fun program with C# or Visual Basic.

Image Processing

• DynamicImage - High-performance open-source image manipulation library for ASP.NET.

Machine Learning and Data Science

• Deedle - Data frame and (time) series library for exploratory data manipulation with C# and F# support

• R Provider - Type provider that exposes R packages and functions in a type-safe way to F# callers

MVVM

• Okra App Framework - An app centric MVVM framework for Windows 8.1 built with dependency injection in mind, including a full set of Visual Studio MVVM templates.

Object to object mapping

• AutoMapper (⭐9.4k) - A convention-based object-object mapper in .NET. https://automapper.org

Office

• NPOI (⭐5k) - This project is the .NET version of POI Java project at https://poi.apache.org/.

Package Management

• Paket (⭐1.9k) - A package dependency manager for .NET with support for NuGet packages and GitHub repositories. https://fsprojects.github.io/Paket/

Search

• Lucene.net - Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users

Testing

• NSubstitute - A friendly substitute for .NET mocking frameworks

Visual Studio Plugins

• Resharper - Developer Productivity Tool for Visual Studio [$]

Web Frameworks

• ASP.NET MVC - ASP.NET is a free web framework for building great web sites and applications

Feb 27, 2019

E-Commerce and Payments

• Square (⭐28) - The official SDK for Square payments and other Square APIs.

Feb 08, 2019

Package Management

• BaGet (⭐2.3k) - A cross-platform, lightweight NuGet and Symbol server

Tools

• NETworkManager (⭐3.7k) - A powerful tool for managing networks and troubleshoot network problems!

Jan 29, 2019

Strong Naming

• Strong Namer (⭐316) - Automatically add strong names to referenced assemblies which do not already have a strong name. This will allow you to reference and use (NuGet packages with) assemblies which are not strong named from your projects that do use a strong name.

Jan 23, 2019

Interoperability

• PInvoke Interop Assistant (⭐374) - Converts C to managed P/Invoke signatures or verse visa.

Search

• SolrExpress (⭐66) - A simple and lightweight query .NET library for Solr, in a controlled, buildable and fail fast way

Jan 14, 2019

Algorithms and Data structures

• Algorithmia (⭐502) - Algorithm and data-structure library for .NET 3.5 and up. Algorithmia contains sophisticated algorithms and data-structures like graphs, priority queues, command, undo-redo and more.

Application Frameworks

• DotNetty (⭐3.9k) - DotNetty is a port of Netty, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

Compilers, Transpilers and Languages

• Nemerle (⭐601) - Nemerle is a high-level statically-typed programming language for the .NET platform. It offers functional, object-oriented and imperative features. It has a simple C#-like syntax and a powerful meta-programming system.

Documentation

• DocNet (⭐238) - Your friendly static documentation generator, using markdown files to build the content.

Event aggregator and messenger

• MediatR (⭐9.6k) - Simple, unambitious mediator implementation in .NET

Logging

• Foundatio (⭐1.7k) - A fluent logging API that can be used to log messages throughout your application.

Misc

• Polly (⭐12k) - Express transient-exception-handling and resilience policies such as Retry, Wait-and-Retry, Circuit Breaker, and Bulkhead Isolation in a fluent manner. Fully thread-safe and full async support. (4.0 / 4.5 / .NET Core / .NET Standard / Xamarin).

• Warden (⭐615) - Define "health checks" for your applications, resources and infrastructure. Keep your Warden on the watch

Queue

• RestBus (⭐361) - A service-oriented .NET messaging library for RabbitMQ.

• Confluent's .NET Client (⭐2.5k) - Confluent's .NET Client for Apache Kafka.

• Brighter (⭐1.8k) - Command Dispatcher, Processor, and Distributed Task Queue https://www.goparamore.io/

Testing

• Canopy (⭐497) - Canopy is a free, open source F# web automation and testing framework

Jan 02, 2019

WPF

• WPF (⭐6.3k) - WPF is a .NET Core UI framework for building Windows desktop applications.

Dec 23, 2018

Application Templates

• Nucleus (⭐347) - Vue startup application template that uses ASP.NET Core API layered architecture at the back-end and JWT based authentication

Dec 10, 2018

Application Frameworks

• ABP (⭐10k) - The next generation of the ASP.NET Boilerplate web application framework.

Books

• The Little ASP.NET Core Book - A free, open-source, tutorial-based book aiming to provide a simple introduction to ASP.NET Core.

Code Analysis and Metrics

• Codinion - Enhanced syntax highlighting for C# and some other "Visual" features. [$]

GUI

• SciterSharp (⭐96) - Create .NET cross-platform desktop apps using not just HTML, but all features of Sciter engine: CSS3, SVG, scripting, AJAX, <video>... Sciter is free for commercial use

Mathematics

• UnitConversion (⭐168) - Expansible Unit Conversion Library for .NET Core and .NET Framework

Trading

• StockSharp (⭐5.7k) - Trading and algorithmic trading open source platform (stock markets, forex, bitcoins and options). https://stocksharp.com

Visual Studio Plugins

• Productivity Power Tools - A set of extensions to Visual Studio Professional (and above) which improves developer productivity.

Dec 07, 2018

Graphics

• Veldrid (⭐2.2k) - A low-level, portable graphics and compute library for .NET

Nov 30, 2018

Testing

• Stryker.NET (⭐1.6k) - Mutation testing for .NET Core projects

Nov 20, 2018

Parser Library

• Sprache (⭐2.1k) - A simple, lightweight library for constructing parsers directly in C# code

• Pidgin (⭐723) - A lightweight, fast and flexible parsing library for C#, developed at Stack Overflow

• FParsec (⭐472) - A parser combinator library for F#

• Superpower (⭐920) - A C# parser construction toolkit with high-quality error reporting

Nov 10, 2018

IoC

• Stashbox (⭐121) - A lightweight, portable dependency injection framework for .NET based solutions.

Nov 06, 2018

Business Intelligence

• FastReport (⭐2.3k) - The open source report generator for .NET Core 2.x/.Net Framework 4.x. FastReport can be used in ASP.NET MVC, Web API applications.

Nov 05, 2018

IoC

• DryIoc (⭐861) - Simple, fast all fully featured IoC container.

Oct 29, 2018

Graphics

• AssimpNet - A cross-platform .NET Standard wrapper for the Open Asset Importer ("Assimp"). The library enables importing, processing, and exporting of 3D models for rendering in graphics/game applications. Over 40 formats are supported for importing (e.g. OBJ, FBX, GLTF, 3DS, Collada) and a subset of those formats can be exported to (e.g. OBJ, GLTF, 3DS, Collada). Mesh processing features allow for mesh data to be generated or optimized for real-time rendering.

Image Processing

• TeximpNet - A cross-platform .NET Standard library for reading/manipulating/writing image files. The primary focus is to create 2D/3D/Cubemap textures for graphics/game applications, notably to convert images to GPU compressed formats and generate mipmaps. The library wraps the FreeImage native library to import/export over 30 common image formats, and wraps the Nvidia Texture Tools native library for GPU compression features. It also has a fully featured DDS format importer/exporter written in C#.

Oct 28, 2018

CLI

• RunInfoBuilder (⭐40) - A unique command line parser, utilizing object trees for commands.

Oct 25, 2018

Machine Learning and Data Science

• Infer.NET - A framework for running Bayesian inference in graphical models. It can also be used for probabilistic programming.

Oct 23, 2018

Template Engine

• RazorLight (⭐1.4k) - Open source template engine based on Microsoft's Razor parsing engine supporting .NET Standard 2.0

Oct 13, 2018

Misc

• Guard (⭐702) - A high-performance, extensible argument validation library.

Oct 12, 2018

IoC

• Lamar - A fast IoC container heavily optimized for usage within ASP.NET Core and other .NET server side applications.

Oct 09, 2018

Compilers, Transpilers and Languages

• Iron python (⭐1k) - A python 2 implementation that is integrated with the dot net framework.

Oct 08, 2018

Code Analysis and Metrics

• NDepend - is a Visual Studio and VS Team Services extension that estimates your .NET code quality and Technical-Debt, that lets create code rules with C# LINQ syntax, visualize code structure and focus on changes and evolution. [$]

Oct 07, 2018

ORM

• DbExtensions - Data-access framework with a strong focus on query composition, granularity and code aesthetics.

Oct 05, 2018

Office

• NetOffice (⭐603) - .NET wrapper assemblies for Microsoft Office applications.

Oct 04, 2018

Logging

• Sentry (⭐480) - .NET SDK for Sentry Open-source error tracking that helps developers monitor and fix crashes in real time..

Oct 02, 2018

API

• Xamarin.Essentials - Xamarin.Essentials provides developers with cross-platform APIs for their mobile applications.

CMS

• DotNetNuke - DNN Platform is our free, open source web CMS and the foundation of every professional DNN solution. Over 750,000 organizations worldwide have built websites powered by the DNN Platform.

Package Management

• MyGet - Hosted Package Repository for NuGet, NPM, Bower and VSIX. Also provides CI as-a-Service. [$]

GUI

• Qml.Net (⭐1.3k) - A cross-platform Qml/.NET integration for Mono/.NET/.NET Core

• UWP Community Toolkit (⭐5.5k) - The UWP Community Toolkit is a collection of helper functions, custom controls, and app services. It simplifies and demonstrates common developer tasks building UWP apps for Windows 10.

HTML and CSS

• HtmlAgilityPack - an agile HTML parser that builds a read/write DOM and supports plain XPath or XSLT

Source Generator

• Awesome Xamarin (⭐1.9k) - A collection of interesting libraries/tools for Xamarin mobile projects.

Aug 23, 2018

API

• Telegram.Bot (⭐2.7k) - .NET Client for Telegram Bot API

Business Intelligence

• NReco PivotData - in-memory data aggregation/OLAP library, pivot tables generation (render to HTML, exports), ASP.NET pivot builder control [$][Free for single-deployment/non-SaaS]

Machine Learning and Data Science

• ML.NET (⭐8.4k) - Cross-platform open-source machine learning framework which makes machine learning accessible to .NET developers.

Protocols

• SharpSnmpLib - An open source SNMP implementation for .NET/Mono/Xamarin. Versioin 1, 2c, and 3 are supported.

Jul 30, 2018

Application Frameworks

• CSLA .NET (⭐1.1k) - business layer development framework https://cslanet.com/

Caching

• Akavache (⭐2.3k) - An asynchronous, persistent key-value store

Database

• Realm Xamarin (⭐1.2k) - A fast, easy-to-use alternative to SQLite & ORMs - https://realm.io/docs/dotnet/latest/

GIS

• CoordinateSharp (⭐295) - Easily parse or convert coordinate formats and calculate location based solar/lunar information.

IDE

• Visual Studio Express - The free lightweight version of Visual Studio for .NET programming.

• Visual Studio Community - A full-featured IDE

Misc

• LINQPad - a C#/VB/F# scratchpad that instantly executes any expression, statement block or program with rich output formatting and a wealth of features. Also lets you interactively query databases in LINQ. [$]

MVVM

• Catel - Catel is an application development platform with the focus on MVVM (WPF, Silverlight, Windows Phone and WinRT) and MVC (ASP.NET MVC). The core of Catel contains an IoC container, models, validation, memento, message mediator, argument checking, etc.

Jul 20, 2018

GUI

• MaterialDesignInXamlToolkit - Toolkit for creating Material Design styled WPF apps

Jul 19, 2018

Compilers, Transpilers and Languages

• PeachPie (⭐2.2k) - PeachPie is a PHP compiler and runtime for .NET and .NET Core, which allows entire PHP applications to run on the modern, secure and performant .NET and .NET Core platforms.

Web Frameworks

• Coalesce - Coalesce is a framework for rapid-development of ASP.NET Core web applications.

Jul 08, 2018

WPF

• Extended WPF Toolkit™ (⭐3.5k) - A rich collection of controls, components and utilities for creating WPF applications

Jul 01, 2018

Media

• CSCore (⭐2k) - An advanced audio library, supporting playback/recording, decoding/encoding and processing of audio data in realtime (effects, visualizations, ...).

Jun 13, 2018

Application Frameworks

• .NET Boxed Framework (⭐664) - .NET Core Extensions and Helper NuGet packages

Application Templates

• .NET Boxed Templates (⭐3.2k) - .NET project templates with batteries included, providing the minimum amount of code required to get you going faster.

Jun 05, 2018

Media

• LibVLCSharp (⭐1.2k) - Xamarin bindings for libvlc, the multimedia framework powering the VLC applications made by VideoLAN.

Source Generator

• Discover .NET - Awesome .NET open source and community resources.

May 23, 2018

Game

• BEPUphysics (⭐1.6k) - BEPUphysics is a pure C# 3D physics library

May 20, 2018

Assembly Manipulation

• Fody (⭐4k) - Extensible tool for weaving .NET assemblies.

• ILRepack (⭐1k) - Open-source alternative to ILMerge.

CLI

• Gui.cs (⭐8.2k) - Terminal UI toolkit for .NET.

May 15, 2018

Source Generator

• Awesome Roslyn (⭐579) - A curated list of awesome Roslyn books, tutorials, open source projects, analyzers, code fixes, and refactorings.

May 09, 2018

Compilers, Transpilers and Languages

• Mond (⭐311) - A dynamically typed scripting language written in C# with a REPL, debugger, and simple embedding API.

May 07, 2018

Assets

• Bundle Transformer (⭐120) - Modular extension for Microsoft ASP.NET Web Optimization Framework. Its modules supports LESS, Sass, CoffeeScript, TypeScript, Mustache, Handlebars, Autoprefixer along with a bunch of different JS and CSS minifiers.

Compression

• DotNetZip.Semverd (⭐499) - An open-source project that delivers a .NET library for handling ZIP files, and some associated tools. (fork of Unmaintained DotNetZip)

Cryptography

• HashLib - HashLib is a collection of nearly all hash algorithms you've ever seen, it supports almost everything and is very easy to use

ETL

• Cinchoo ETL (⭐657) - ETL Framework for .NET (Read / Write CSV, Flat, Xml, JSON, Key-Value formatted files)

• Reactive ETL - Reactive ETL is a rewrite of Rhino ETL using the reactive extensions for .NET

Event aggregator and messenger

• Xer.Cqrs (⭐98) - A simple library for creating applications based on the CQRS pattern with support for attribute routing and hosted handlers. Developed in C# targeting .NET Standard 1.0.

GUI

• Office Ribbon (⭐680) - A library that implements MS Office Ribbon for WinForms.

HTTP

• Refit (⭐7.2k) - The automatic type-safe REST library for Xamarin and .NET

Minification

• Microsoft Ajax Minifier - Contains JS and CSS minifiers which have a highest performance, because its have been specifically designed for .NET. Optionally produce Source Maps for JS code.

Misc

• MSBuild ILMerge task - MSBuild ILMerge task is a NuGet package allows you to use the famous ILMerge utility in automated builds and/or Visual Studio projects.

MVVM

• MVVM Light Toolkit (⭐1.2k) - The main purpose of the toolkit is to accelerate the creation and development of MVVM applications in WPF, Silverlight, Windows Store (RT) and for Windows Phone

Office

• EPPlus (⭐3.7k) - EPPlus is a .NET library that reads and writes Excel 2007/2010 files using the Open Office XML format (xlsx).

PDF

• WkhtmlToPdf (⭐263) - C# wrapper around wkhtmltopdf console utility. Allow to generate preety PDF using HTML and CSS.

Reactive Programming

• Rx.NET (⭐6k) - The Reactive Extensions (Rx) is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators

Testing

• NCrunch - An automated continuous & concurrent testing tool for Visual Studio. [$]

Visual Studio Plugins

• VSColorOutput - Color highlighting for Build, Find and Debug output windows. Custom match patterns and colors can be added.

WebSocket

• WebSocket4NET - WebSocket client for .NET 2.0+, Xamarin, Mono, Silverlight, Windows Phone, & WinRT

• Crossertech - Provides a great set of tools for you to build real-time applications on the Microsoft.NET plattform and much more. [$]

• WampSharp (⭐382) - A C# implementation of The Web Application Messaging Protocol - a protocol that provides messaging patterns of Remote Procedure Calls and Publish/Subscribe over WebSockets.

Apr 30, 2018

Code Snippets

• .NET Fiddle - Write, compile and run C#, F# and VB code in the browser. The .Net equivalent of JSFiddle.

SDK and API Clients

• Getty Images API SDK (⭐9) - SDK for the Getty Images and iStock APIs

Apr 14, 2018

Compilers, Transpilers and Languages

• Testura.Code (⭐274) - Wrapper around the Roslyn API and used for generation, saving and compiling C# code. It provides methods and helpers to generate classes, methods, statements and expressions.

Apr 06, 2018

IDE

• AvalonStudio (⭐1.5k) - An extensible, cross platform IDE written in C# for Embedded C/C++, .NET Core, Avalonia and Typescript

Apr 02, 2018

Machine Learning and Data Science

• GeneticSharp (⭐1.1k) - Multi-platform genetic algorithm library for .NET Core and .NET Framework. The library has several implementations of GA operators, like: selection, crossover, mutation, reinsertion and termination.

Mar 22, 2018

Application Frameworks

• CoreFX (⭐18k) - The corefx repo contains the library implementation (called "CoreFX") for .NET Core. It includes System.Collections, System.IO, System.Xml and many other components.

Mar 21, 2018

Media

• Xabe.FFmpeg (⭐660) - .NET Standard wrapper for FFmpeg. It allows to process media without know how FFmpeg works, and can be used to pass customized arguments to FFmpeg from C# application. [$]

Mar 08, 2018

Image Processing

• ImageSharp (⭐6.5k) - Fully managed cross-platform library for processing of image files.

Mar 01, 2018

CLI

• Argu (⭐386) - Declarative CLI argument & XML configuration parser for F# applications.

• clipr (⭐87) - A CLI library inspired by Python's argparse that transforms a command line into a strongly-typed object. It supports custom argument types, automated (and localized) help generation, and a variety of ways to store parsed arguments.

• CliWrap (⭐3.6k) - Wrapper for command line interfaces.

• Command Line Parser (⭐4k) - The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command-line arguments and related tasks

• CsConsoleFormat (⭐356) - .NET C# library for advanced formatting of console output.

• Docopt (⭐332) - Command-line interface description language that will make you smile.

• Fluent Command Line Parser (⭐520) - A simple, strongly typed .NET C# command-line parser library using a fluent easy to use interface

• Power Args (⭐533) - PowerArgs converts command-line arguments into .NET objects that are easy to program against. It also provides a ton of optional capabilities such as argument validation, auto generated usage, tab completion, and plenty of extensibility

Feb 24, 2018

Git Tools

• GitRead.Net (⭐16) - GitRead.Net is a .NET Standard library which allows you to very easily interrogate a Git repository that you have on disk. It allows you to enumerate the commit log, count lines per file and list files changed by a commit.

Feb 14, 2018

Misc

• ConsoleTableExt (⭐303) - Fluent library to create table for .Net console application.

Feb 11, 2018

SDK and API Clients

• Countly SDK for Windows (⭐21) - Windows SDK for Countly analytics and marketing platform for product and marketing managers

Jan 27, 2018

Misc

• DeviceDetector.NET (⭐248) - The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model.

Jan 23, 2018

Artificial Intelligence

• SIML - Synthetic Intelligence Markup Language, a next generation Chatbot & Digital Assistant Language.

Web Frameworks

• Giraffe (⭐1.9k) - Functional (F#) ASP.NET Core micro framework for building rich web applications

Jan 19, 2018

GUI

• Ooui (⭐1.6k) - A small cross-platform UI library that brings the simplicity of native UI development to the web

Jan 07, 2018

Protocols

• DNS (⭐374) - A library for parsing and serializing DNS messages. Includes a basic DNS client and server.

Jan 03, 2018

GUI

• QtSharp (⭐562) - Mono/.NET Bindings for Qt

IDE

• Visual Studio Code - Excellent open source editor from Microsoft, based on Electron.

Dec 12, 2017

CMS

• BlogEngine.NET (⭐916) - Simple but full featured ASP.NET blog

Misc

• Valit (⭐314) - Valit is dead simple, fluent validation for .NET Core.

Dec 06, 2017

Application Frameworks

• AspectCore Framework (⭐1.6k) - AspectCore Framework is an Aspect-Oriented Programming based cross platform framework for .NET Core and .NET Framework. Core support for aspect-interceptor,dependency injection integration , web applications , data validation , and more.

Nov 29, 2017

Mail

• StrongGrid (⭐163) - Client for SendGrid's v3 API. Not only allows you to send emails, but also allows you to bulk import contacts, manage lists and segments, create custom fields for your lists, etc. Also includes a parser for SendGrid Webhooks.

Nov 27, 2017

Tools

• posh-dotnet (⭐42) - PowerShell tab completion for the dotnet CLI (⭐3.5k)

Nov 22, 2017

Mathematics

• AutoDiff (⭐80) - AutoDiff is a library for quickly computing gradients of functions defined by expressions. Mainly useful in numerical optimization

Nov 09, 2017

Code Analysis and Metrics

• App.Metrics (⭐2.2k) - App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application and reports it's health. See the docs for me details.

Datetime

• NodaTime (⭐2.5k) - Noda Time is an alternative date and time API for .NET. It helps you to think about your data more clearly, and express operations on that data more precisely. https://nodatime.org/

Decompilation

• JustDecompile Engine (⭐1.3k) - The decompilation engine of JustDecompile

Office

• DocX (⭐1.6k) - DocX is a .NET library that allows developers to manipulate Word 2007/2010/2013 files, it does not require Microsoft Word or Office to be installed.

Tools

• Fiddler - The free web debugging proxy for any browser, system or platform

Nov 07, 2017

HTTP

• RestLess (⭐109) - The automatic type-safe-reflectionless REST API client library for .Net Standard.

Oct 29, 2017

GUI

• Neutronium (⭐1.3k) - Build .NET desktop applications using HTML, CSS, javascript and MVVM bindings such as with WPF.

Oct 28, 2017

Misc

• DeviceId (⭐572) - Generate a 'device ID' that can be used to uniquely identify a computer.

Oct 26, 2017

Object to object mapping

• AgileMapper (⭐445) - A zero-configuration Object-Object mapper supporting .NET Standard 1.0

Oct 22, 2017

Misc

• YoutubeExplode (⭐2.4k) - Ultimate library for extracting metadata and downloading Youtube videos and playlists.

Oct 11, 2017

Misc

• SystemWrapper (⭐168) - SystemWrapper is .NET library for easier testing of system APIs.

Oct 07, 2017

Web Frameworks

• NancyFx (⭐7.2k) - Lightweight, low-ceremony, framework for building HTTP-based services on .NET and Mono

• IISNode (⭐1.8k) - Host Node.js applications in IIS

• Suave.IO - Framework/library/web server that makes you cry tears of joy after finishing your project ahead-of-time when you look at the beautiful code you've written in F#.

API

• Nelibur (⭐125) - Nelibur is message based web service framework on the pure WCF. Nelibur simplifies creating high-performance and message-based web services and you certainly have all the power of the WCF.

Application Templates

• Serene (⭐2.3k) - Serenity is an ASP.NET MVC application platform designed to simplify and shorten development of data-centric business applications with a service-based architecture. Serene is a starter template to build Serenity applications.

Assets

• NodeAssets (⭐23) - Asset Manager for .NET that has live CSS updates using SignalR and can optionally leverage Node.js compilers

• SquishIt (⭐462) - Lets you easily bundle some CSS and JavaScript

Build Automation

• FAKE (⭐1.2k) - F# Make, a cross-platform build automation system

• Cake (⭐3.6k) - Cake (C# Make) is a cross-platform build automation system with a C# DSL.

Caching

• Foundatio (⭐1.7k) - A common interface with in memory, Redis and hybrid implementations.

• Cashew (⭐82) - a .NET library for caching responses easily with an HttpClient through an API that is simple and elegant yet powerful.

CLI

• EntryPoint (⭐138) - Composable CLI Argument Parser for .NET Core & .NET Framework 4.5+.

Compilers, Transpilers and Languages

• JSIL (⭐1.7k) - CIL to JavaScript Compiler http://jsil.org/

Compression

• Snappy for Windows - Snappy compression library for .NET baked on P/Invoke

Database

• RavenDB (⭐3.2k) - A LINQ-enabled document database for .NET

• Marten (⭐2.3k) - PostgreSQL as a document database and event store for .NET applications

Database Drivers

• Npgsql (⭐2.9k) - .NET data provider for PostgreSQL

• MongoDB (⭐3k) - Official MongoDB C# driver

• ServiceStack Redis (⭐2.3k) - .NET's leading C# Redis client

• StackExchange Redis (⭐5.5k) - General purpose Redis client from StackExchange

• Cassandra (⭐585) - DataStax .NET driver for Apache Cassandra

• Couchbase (⭐265) - Official Couchbase .NET client library, based on the Enyim memcached client

Datetime

• DateTimeExtensions (⭐487) - Common Date Time operations on the form of extensions to System.DateTime, including holidays and working days calculations on several culture locales.

• Exceptionless.DateTimeExtensions (⭐223) - DateTimeRange, Business Day and various DateTime, DateTimeOffset, TimeSpan extension methods.

Deployment

• Unfold (⭐135) - PowerShell-based deployment solution for .NET web applications

• Octo Pack (⭐180) - Used to build NuGet packages of your application for deployment using tools such as Octopus Deploy

Distributed Computing

• Akka.net (⭐4.4k) - Akka.NET is a port of the popular Java/Scala framework Akka to .NET. This is a community-driven port and is not affiliated with Typesafe who makes the original Java/Scala version.

• Zebus (⭐272) - Zebus is a lightweight, highly versatile, peer-to-peer service bus, built with CQRS principles in mind. It allows applications to communicate with each other in a fast and easy manner. Most of the complexity is hidden in the library and you can focus on writing code that matters to you, not debugging messaging code. A very fundamental base for any distributed application.

E-Commerce and Payments

• Paypal Merchant SDK (⭐83) - Official PayPal Merchant SDK for .NET

• Stripe.Net (⭐1.3k) - Stripe.net is a full service .NET API for https://stripe.com/

• Virto Commerce (⭐1.1k) - Virto Commerce is the second generation release and is the only enterprise level e-commerce product fully available under Open Source license. Virto Commerce is based on .NET 4.5 with extensive use of MVC, IoC, EF, Azure, AngularJS and many other cutting edge technologies. It can be deployed in Microsoft Cloud (Azure), Amazon Web Services (AWS) and on-premise. https://virtocommerce.com

Environment Management

• Dotnet CLI (⭐3.5k) - The cross-platform .NET Core command-line toolchain utility.

Event aggregator and messenger

• Mediator.Net (⭐338) - A simple mediator for .NET for sending command, publishing event and request response with pipelines supported

Game

• Wave Engine - Wave engine is a free C# component-based modern game engine which allows you to create cross-platform games supporting Kinect, Oculus Rift, Vuforia, Cardboard, Leap Motion and much more. [Free][Proprietary]

• Nez (⭐1.6k) - Nez is a free 2D-focused framework that works with MonoGame and FNA

Git Tools

• Bonobo Git Server (⭐1.8k) - Bonobo Git Server for Windows is a web application you can install on your IIS and easily manage and connect to your Git repositories. https://bonobogitserver.com/

• GitVersion (⭐2.5k) - Generate a Semantic Version Number based on the state of your Git repository

• LibGit2Sharp (⭐2.8k) - LibGit2Sharp brings all the might and speed of libgit2, a native Git implementation, to the managed world of .NET and Mono.

GUI

• MahApps.Metro (⭐8.7k) - Toolkit for creating Metro-styled WPF apps

• Eto.Forms (⭐3.3k) - Cross-platform GUI framework for desktop and mobile applications in .NET and Mono

• MaterialSkin (⭐2.6k) - Theming .NET WinForms, C# or VB.Net, to Google's Material Design principles.

HTML and CSS

• dotless (⭐697) - .NET port of the Ruby Less CSS lib http://www.dotlesscss.org

• ExCSS (⭐280) - CSS3 parser library for C#

HTTP

• Http.fs (⭐307) - A functional HTTP client for F#.

• RestSharp (⭐9.1k) - Simple REST and HTTP API client for .NET

• EasyHttp (⭐961) - HTTP library for C#

IDE

• MonoDevelop (⭐2.8k) - MonoDevelop is a cross-platform IDE mostly aimed at Mono/.NET developers

Install tools

• Squirrel (⭐6.8k) - Squirrel is both a set of tools and a library, to completely manage both installation and updating your desktop Windows application.

• Chocolatey (⭐9.1k) - like yum or apt-get, but for Windows.

Interoperability

• LegacyWrapper (⭐71) - LegacyWrapper uses a wrapper process to call DLLs from a process of the opposing architecture (x86 or AMD64).

IoC

• Ninject (⭐2.6k) - The ninja of .NET dependency injectors

JavaScript Engines

• Edge.js (⭐5.3k) - Run .NET and Node.js code in-process on Windows, macOS, and Linux

Logging

• NLog (⭐5.9k) - NLog - Advanced .NET and Silverlight logging

• Logazmic (⭐54) - Open source NLog viewer for Windows

Mail

• FluentEmail (⭐2.6k) - A fluent wrapper for System.Net.Mail with Razor templating support.

• PreMailer.Net (⭐600) - C# library that moves your stylesheets to inline style attributes, for maximum compatibility with e-mail clients.

Metrics

• Foundatio (⭐1.7k) - A common interface with in-memory, Redis, StatsD, and Metrics.NET implementations.

Misc

• CSharp Pad - A web-based C# REPL with awesome code completion.

• FlatMapper (⭐85) - A library to import and export data from and to plain text files in a LINQ-compatible way.

• ScriptCS (⭐2.4k) - Write C# apps with a text editor, NuGet and the power of Roslyn!

Object to object mapping

• TinyMapper (⭐652) - A tiny and quick object mapper for .NET.

• ExpressMapper (⭐300) - A lightweight, lighting fast .NET mapper to map one type of object(s) to another in automated and easy way. ExpressMapper relies completely on the expression trees.

ORM

• Dapper.FastCRUD (⭐449) - The fastest micro-ORM extension for Dapper

• Insight.Database (⭐802) - Insight.Database is a fast, lightweight, micro-ORM for .NET

Package Management

• NuGet - The .NET package manager

Query Builders

• SqlKata - Elegant SQL query builder, that supports complex queries, joins, sub queries, nested where conditions, vendor engine targets and more

Queue

• Foundatio (⭐1.7k) - A common interface with in-memory, Redis and Azure implementations.

Search

• PlainElastic.Net (⭐158) - Plain .NET client for ElasticSearch

• SolrNet (⭐913) - Solr client for .NET

Serialization

• Jil (⭐2.1k) - Fast .NET JSON serializer, built on Sigil (used by StackOverflow)

State machines

• Automatonymous (⭐706) - A state machine library for .NET - allows you to write fluent style state machines

Static Site Generators

• Sandra.Snow (⭐231) - Jekyll-inspired static site generation for .NET

Testing

• NUnit (⭐2.3k) - A unit-testing framework for all .NET languages

Tools

• CatLight - Build status notifications for TFS/Jenkins/Travis/Appveyor. Cross-platform desktop app based on .NET Core and Electron. [Free][Proprietary]

WebSocket

• NetGain (⭐920) - A high performance WebSocket server library powering Stack Overflow.

Oct 05, 2017

MVVM

• Win Application Framework (WAF) (⭐667) - A lightweight Framework that helps you to create well structured WPF and UWP Applications. It supports you in applying a Layered Architecture and the Model-View-ViewModel pattern.

Oct 04, 2017

GIS

• GeoJSON.NET (⭐401) - .Net library for GeoJSON types & corresponding Json.Net (de)serializers

Oct 01, 2017

IoC

• Unity (⭐1.6k) - Lightweight extensible dependency injection container with support for constructor, property, and method call injection

Sep 28, 2017

Serialization

• Utf8Json (⭐2.3k) - Fast and Zero Allocation JSON Serializer for C#(.NET, .NET Core, Unity and Xamarin), this serializer write/read directly to UTF8 binary so boostup performance.

Sep 26, 2017

Git Tools

• RepoZ (⭐887) - A Git repository information aggregator with Windows Explorer & CLI-enhancements

Sep 24, 2017

Tools

• Fake JSON Server (⭐356) - Fake REST API for prototyping or as a CRUD Back End. No need to define types, uses dynamic typing. Data is stored to a single JSON file. Has authentication, WebSocket notifications, async long running operations, random generation for errors/delays and experimental GraphQL support.

Sep 22, 2017

Protocols

• FluentFTP (⭐2.5k) - An FTP and FTPS library for .NET, optimized for speed. Provides extensive FTP commands, file uploads/downloads and FTP proxies.

Sep 17, 2017

Office

• ExcelDataReader (⭐3.5k) - Lightweight and fast library written in C# for reading Microsoft Excel files (2.0-2007).

Sep 12, 2017

Event aggregator and messenger

• Rx Event Aggregator - Super-simple Reactive-Extension code from Reactive.EventAggregator

• TinyMessenger (⭐270) - A lightweight event aggregator/messenger for loosely coupled communication.

IoC

• TinyIoC (⭐814) - An easy to use, hassle free, Inversion of Control Container for small projects, libraries and beginners alike.

Misc

• HidLibrary (⭐519) - This library enables you to enumerate and communicate with Hid compatible USB devices in .NET.

MVVM

• MVVM Dialogs (⭐538) - Framework simplifying the concept of opening dialogs from a view model when using MVVM in WPF or UWP.

Sep 11, 2017

Build Automation

• Nuke (⭐1.9k) - Cross-platform build automation system

Image Processing

• OpenCvSharp (⭐4.6k) - Cross platform wrapper of OpenCV for .NET Framework.

Logging

• BugSnag - Logs errors. Includes useful diagnostic info like stack trace, session, release, etc. Has a free tier. [Free for OSS][$]

PDF

• PdfiumViewer (⭐861) - PdfiumViewer is a PDF viewer based on the PDFium project.

Sep 09, 2017

Application Frameworks

• Mono (⭐10k) - Open source ECMA CLI, C#, F#, VB and .NET implementation

Sep 05, 2017

Tools

• CodeHub (⭐23k) - CodeHub is the best way to browse and maintain your GitHub repositories on any iOS device!

Sep 02, 2017

Authentication and Authorization

• ASP.NET Identity (⭐2k) - New membership system for ASP.NET applications

Aug 25, 2017

Database

• JsonFlatFileDataStore (⭐364) - Simple JSON flat file data store with support for typed and dynamic data

Aug 07, 2017

UI Automation

• Atata (⭐463) - Automated web testing full featured framework based on Selenium WebDriver.

Aug 04, 2017

GUI

• WinApi (⭐767) - A simple, direct, ultra-thin CLR library for high-performance Win32 Native Interop with automation, windowing, DirectX, OpenGL and Skia helpers.

State machines

• LiquidState (⭐229) - Efficient asynchronous and synchronous state machines for .NET

Jul 26, 2017

CMS

• mojoPortal (⭐176) - MojoPortal is an extensible, cross database, mobile friendly, web content management system (CMS) and web application framework written in C# ASP.NET

Code Analysis and Metrics

• StyleCop - StyleCop analyzes C# source code to enforce a set of style and consistency rules

GIS

• SharpMap An easy-to-use mapping library for use in web and desktop applications

Image Processing

• Magick.NET (⭐2.8k) - .NET wrapper for the ImageMagick library.

JavaScript Engines

• ClearScript (⭐1.5k) - A library that makes it easy to add scripting to your .NET applications. It currently supports JavaScript (via V8 and JScript) and VBScript.

Logging

• Essential Diagnostics (⭐62) - Extends the inbuilt features of System.Diagnostics namespace to provide flexible logging

• Semantic Logging Application Block (SLAB) (⭐214) - Extends the inbuilt features of System.Diagnostics.Tracing namespace (EventSource class) to log to several sinks including Azure Tables, Databases, files (JSON, XML, text). Supports in-process and out-of-process logging through ETW, and Rx for real-time filtering/aggregating of events.

Jul 25, 2017

CLI

• SharpNetSH (⭐59) - A simple netsh library for C#.

Jul 23, 2017

Queue

• CAP (⭐6k) - An EventBus with local persistent message functionality for RabbitMQ or Kafka.

Jul 20, 2017

Machine Learning and Data Science

• Spreads (⭐397) - Series and Panels for Real-time and Exploratory Analysis of Data Streams. Spreads library is optimized for performance and memory usage. It is several times faster than other open source projects.

Jul 06, 2017

CLI

• ReadLine (⭐790) - A GNU-Readline like library for .NET/.NET Core.

Decompilation

• dotPeek - Free-of-charge standalone tool based on ReSharper's bundled decompiler. It can reliably decompile any .NET assembly into equivalent C# or IL code. It can create Visual Studio solutions based on the original binary files in a straight-forward way. [Proprietary] [Free]

Distributed Computing

• Foundatio (⭐1.7k) - Pluggable foundation blocks for building distributed apps.

GUI

• Modern UI for WPF - MUI (⭐2.5k) - Set of controls and styles to convert WPF applications into a great looking Modern UI apps.

MVVM

• Gemini (⭐1k) - IDE framework similar in concept to the Visual Studio Shell. Built on WPF, AvalonDock, and Caliburn Micro.

Windows Services

• TopShelf (⭐3.6k) - An easy service hosting framework for building Windows services using .NET

Jun 12, 2017

GUI

• DockPanelSuite - The Visual Studio inspired docking library for .NET WinForms

Style Guide

• C# Style Guide - StackOverflow Q & A on style guides

• C# Coding Conventions - Official MSDN C# code conventions

Jun 11, 2017

IDE

• Consulo - A cross-platform IDE with C# & Java support, fork of IntelliJ IDEA Community Edition

Install tools

• Wax - An interactive editor for WiX projects.

WPF

• Data Grid Extensions (⭐647) - Modular extensions for the WPF DataGrid control, like filtering, additional column events, extended star-size column behavior, and more...

Jun 06, 2017

Scheduling

• DurableTask (⭐1.3k) - This framework allows users to write long running persistent workflows in C# using the async/await capabilities.

May 15, 2017

GUI

• Avalonia (⭐18k) - A multi-platform .NET UI framework (formerly known as Perspex).

May 12, 2017

IDE

• RoslynPad (⭐1.9k) - A simple C# editor based on Roslyn and AvalonEdit.

May 09, 2017

Distributed Computing

• MBrace - Integrated Data Scripting for the Cloud

IoC

• VS MEF (⭐367) - Managed Extensibility Framework (MEF) implementation used by Visual Studio.

ORM

• Dapper (⭐16k) - A simple object mapper for .NET by StackExchange

Apr 12, 2017

Distributed Computing

• protoactor-dotnet (⭐1.6k) - Proto Actor - Ultra fast distributed actors for Golang and C#

Apr 10, 2017

Code Analysis and Metrics

• NsDepCop (⭐154) - Static code analysis tool to enforce namespace dependency rules in C# projects.

Decompilation

• dnSpy (⭐23k) - open-source .NET assembly browser, editor, decompiler and debugger

Mar 31, 2017

Misc

• Enums.NET (⭐1.5k) - Enums.NET is a high-performance type-safe .NET enum utility library

Mar 28, 2017

Scheduling

• Hangfire - An easy way to perform fire-and-forget, delayed and recurring tasks inside .NET apps

• Chroniton (⭐179) - A simple, fully integrable, and customizable library for running strongly typed jobs (tasks) on schedules.

Mar 24, 2017

Queue

• RabbitMQ.NET (⭐1.9k) - Implementation of an AMQP client library for C#, and a binding exposing AMQP services via WCF

Mar 22, 2017

E-Commerce and Payments

• SimplCommerce (⭐3.9k) - Super simple ecommerce system built on .NET Core. Simple to use and easy to customize. Thanks to .NET Core, you can run the SimplCommerce on Windows, Linux. With various RDBMS: Microsoft SQL Server, PostgreSQL, MySQL

Mar 16, 2017

Code Analysis and Metrics

• .NET Compiler Platform ("Roslyn") Analyzers (⭐1.4k) - A number of Roslyn diagnostic analyzers initially developed to help flesh out the design and implementation of the static analysis APIs.

Mar 09, 2017

CMS

• N2CMS (⭐361) - Open source, lightweight, code-first CMS able to seamlessly integrate into any MVC project.

ORM

• FluentMigrator (⭐3k) - Fluent Migrations framework for .net

Feb 28, 2017

Cryptography

• SecurityDriven.Inferno (⭐556) - .NET crypto library. Professionally audited.

Feb 24, 2017

SMS and Phone calls

• Twilio-csharp (⭐624) - A C#/.NET Library for sending and receiving phone calls and text messages with Twilio.

Feb 23, 2017

Interoperability

• pythonnet (⭐3.8k) - Python and .NET interop framework

Feb 21, 2017

Visual Studio Plugins

• OzCode - OzCode is a Visual Studio Extension which cuts down on debugging time and increases productivity by detecting and isolating bugs, making them easy to fix. [$]

Feb 19, 2017

Testing

• Expecto (⭐600) - A smooth testing framework for F# with tests as values. Unit testing, property based testing, performance testing and stress testing.

Feb 12, 2017

CMS

• Composite C1 (⭐245) - A web CMS that focus on UX and adaptability

Testing

• Fluent Assertions (⭐3.3k) - A set of .NET extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style test

Feb 11, 2017

GIS

• GeoJSON4EntityFramework (⭐18) - A library to create GeoJSON from Entity Framework Spatial Data or Well-Known Text (WKT) inputs.

Jan 30, 2017

Extensions

• Z.ExtensionMethods (⭐1.1k) - Over a 1000 useful extension methods

Jan 26, 2017

Logging

• elmah.io - Cloud logging for .NET web applications using ELMAH. Find bugs before you go live. Powerful search, API, integration with Slack, GitHub, Visual Studio and more. [Free for OSS] [$]

Jan 23, 2017

Visual Studio Plugins

• CodeLineage - Easy access to a cumulative diff view between file revisions (supports svn, git, mercurial, perforce).

Jan 19, 2017

Trading

• Lean (⭐7.5k) - Lean Engine is an open-source fully managed C# algorithmic trading engine built for desktop and cloud usage. https://www.quantconnect.com/lean/

Source Generator

• ASP.NET Core Library and Framework Support (⭐208) - A list of what .NET libraries and frameworks are currently supported by ASP.NET Core and .NET Core).

Jan 02, 2017

Static Site Generators

• Wyam - A simple to use, highly modular, and extremely configurable static content generator

Web Frameworks

• DotVVM (⭐677) - MVVM framework for people who don't like to write JavaScript, with OWIN and ASP.NET Core support and a free extension for Visual Studio 2015 and 2017.

Dec 23, 2016

Serialization

• Hyperion (⭐269) - A high performance polymorphic serializer for the .NET framework.

Source Generator

• Weekly C# Digest - Weekly email newsletter with manually curated top 5 links from the .NET community.

Dec 21, 2016

Functional programming

• Optional (⭐817) - A robust option type for C#

Dec 15, 2016

GUI

• FastColoredTextBox (⭐1.1k) - Fast Colored TextBox is text editor component for .NET. Allows you to create custom text editor with syntax highlighting. It works well with small, medium, large and very-very large files.

Nov 17, 2016

Code Analysis and Metrics

• BenchmarkDotNet (⭐9k) - Powerful .NET library for benchmarking.

Visual Studio Plugins

• Nuget Package Manager - NuGet is the package manager for the Microsoft development platform including .NET

Nov 16, 2016

Compilers, Transpilers and Languages

• P (⭐2.7k) - P is a language for asynchronous event-driven programming.

• Roslyn-linq-rewrite (⭐708) - Compiles C# code by first rewriting the syntax trees of LINQ expressions using plain procedural code, minimizing allocations and dynamic dispatch.

Nov 06, 2016

Misc

• Jot (⭐568) - a library for persisting and restoring application state (a better alternative to .settings files).

Oct 27, 2016

Algorithms and Data structures

• C# Algorithms (⭐5.5k) - A C# plug-and-play class-library project of standard Data Structures and Algorithms. It contains 35+ Data Structures and 30+ Algorithms designed as Object-Oriented isolated components.

Misc

• ByteSize (⭐473) - ByteSize is a utility class that makes byte size representation in code easier by removing ambiguity of the value being represented. ByteSize is to bytes what System.TimeSpan is to time.

Template Engine

• Mustache Sharp (⭐296) - An extension of the mustache text template engine for .NET.

UI Automation

• Managed Windows API - Introspect and automate third-party Windows / VC++ applications without needing its source code.

Oct 19, 2016

CLI

• Colorful.Console (⭐1.2k) - Colorful console output.

DLR

• cmd (⭐345) - C# library to run external programs in a simpler way. Demonstration of "dynamic" features of C#.

Functional programming

• language-ext (⭐5.5k) - This library uses and abuses the features of C# 6+ to provide a functional 'Base class library', that, if you squint, can look like extensions to the language itself. It also includes an 'Erlang like' process system (actors) that can optionally persist messages and state to Redis (note you can use it without Redis for in-app messaging). The process system additionally supports Rx streams of messages and state allowing for a complete system of reactive events and message dispatch.

Graphics

• LibTessDotNet (⭐267) - .NET port of the famous GLU Tessellator, triangulates polygons

Office

• ClosedXML (⭐3.8k) - ClosedXML makes it easier for developers to create Excel 2007/2010 files

WebSocket

• Websockets.PCL (⭐98) - WebSockets.PCL is a portable class library, profile 259, C# WebSocket implementation.

Source Generator

• Awesome Unity (⭐5.8k) - A categorized community-driven collection of high-quality awesome Unity assets, projects, and resources.

Oct 18, 2016

IDE

• Rider - A cross-platform C# IDE based on the IntelliJ platform and ReSharper

Logging

• Loupe - Centralized .NET logging and monitoring. [Proprietary] [Free Tier]

Oct 17, 2016

Machine Learning and Data Science

• FsLab - A collection of data science and machine learning libraries for F# and .NET

Oct 16, 2016

HTTP

• HttpClientGoodies (⭐62) - utilities for working with HttpClient

Queue

• RawRabbit (⭐730) - A modern .NET Core library for RabbitMQ.

Sep 27, 2016

GUI

• ScintillaNET (⭐919) - Windows Forms control for the Scintilla text editor component (Scintilla is used by Notepad++)

Image Processing

• ImageProcessor (⭐2.5k) - Open-source .NET library to manipulate images on-the-fly.

Media

• NAudio (⭐4.6k) - Playback, decode and encode audio in a variety of file formats such as MP3, MP4, WAV, AIFF, Speex, etc.

Protocols

• SSH.NET (⭐3.3k) - A Secure Shell (SSH) library for .NET, optimized for parallelism. Provides SSH commands, SFTP/SCP uploads and downloads, and SOCKS4/SOCKS5/HTTP proxies.

Web Browsers

• CefSharp (⭐9.3k) - HTML5, CSS3 and JS web browser powered by Chromium, for WinForms and WPF

Sep 26, 2016

Code Analysis and Metrics

• AspNet.Metrics (⭐9) - Capturing CLR, application-level web request metrics. Middleware and extensions using Metrics-Net

Sep 19, 2016

Web Frameworks

• FubuMVC (⭐421) - A front-controller style MVC framework for .NET

Sep 16, 2016

Image Processing

• ImageResizer - Add commands to image URLs to get altered versions in milliseconds. Resizing, editing etc of images in real-time.

JavaScript Engines

• Jint (⭐3.3k) - JavaScript interpreter for .NET which provides full ECMA 5.1 compliance and can run on any .NET platform.

• Jurassic (⭐764) - A implementation of the ECMAScript language and runtime. It aims to provide the best performing and most standards-compliant implementation of JavaScript for .NET.

Sep 12, 2016

Graphics

• OpenTK (⭐2.8k) - The Open Toolkit is an advanced, low-level C# library that wraps OpenGL, OpenCL and OpenAL

Sep 10, 2016

Database

• Yessql (⭐1.1k) - A .NET document database working on any RDBMS

Misc

• Streams (⭐380) - A lightweight F#/C# library for efficient functional-style pipelines on streams of data.

Source Generator

• Awesome .NET Performance (⭐2.9k) - A curated list of awesome .NET Performance books, courses, trainings, conference talks, blogs and most inspiring open source contributors.

• awesome-ddd (⭐9.9k) - A curated list of Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), Event Sourcing, and Event Storming resources

Aug 31, 2016

Compilers, Transpilers and Languages

• Fable (⭐2.6k) - F# to JavaScript Compiler

Tools

• Visual Studio Uninstaller (⭐3.9k) - Uninstall and clean up all components of Visual Studio.

Aug 30, 2016

Database

• Ignite (⭐4.5k) - Distributed in-memory platform: document database with SQL and LINQ support; distributed computations; distributed services and events.

IoC

• Scrutor (⭐3k) - Assembly scanning extensions for Microsoft.Extensions.DependencyInjection.

Markdown Processors

• markdig (⭐3.6k) - A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET.

ORM

• LLBLGen Pro - Entity Modeling solution for Entity Framework, NHibernate, Linq to SQL and its own ORM framework: LLBLGen Pro Runtime Framework. [$][Free Lite version]

Aug 27, 2016

Serialization

• Migrant (⭐46) - Fast and flexible serialization framework usable on undecorated classes.

Source Generator

• Awesome .NET Core (⭐18k) - A collection of awesome .NET core libraries, tools, frameworks and software

Aug 24, 2016

Misc

• Aeron.NET (⭐451) - Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron

• TypeShape (⭐271) - TypeShape is a small, extensible F# library for practical generic programming

Aug 23, 2016

IDE

• Ionide - An Atom Editor and Visual Studio Code package suite for cross platform F# development.

Aug 21, 2016

Serialization

• FsPickler (⭐323) - A fast multi-format message serializer for .NET

Aug 20, 2016

Build Automation

• Nake (⭐219) - Magic script-based C# task runner

Database

• Streamstone (⭐368) - Event store for Azure Table Storage

Aug 19, 2016

Queue

• Kafunk (⭐162) - F# Kafka client from Jet

Aug 18, 2016

Serialization

• FileHelpers (⭐1.1k) - free and easy to use .NET library to import or export data from fixed length or delimited records in files, strings or streams.

Aug 17, 2016

Compilers, Transpilers and Languages

• LinqOptimizer (⭐469) - An automatic query optimizer-compiler for Sequential and Parallel LINQ

Continuous Integration

• AppVeyor - .NET Continuous Integration and Deployment as a service. [$] [Free for OSS]

Aug 10, 2016

ORM

• PetaPoco (⭐2k) - A tiny ORM-ish thing for your POCOs

Tools

• Netling (⭐1.3k) - A load tester client for easy web testing. It is extremely fast while using little CPU or memory.

Aug 09, 2016

Game

• MonoGame (⭐9.5k) - One framework for creating powerful cross-platform games

Jul 28, 2016

Distributed Computing

• FsShelter (⭐1) - F# library for authoring Apache Storm components and topologies. Offering high-level abstractions for distributed and fault-tolerant event stream processing.

ORM

• Limebean (⭐28) - Hybrid ORM which uses SQL fragments and doesn't require Model Classes.

Jul 27, 2016

Template Engine

• Stubble (⭐344) - Trimmed down {{mustache}} templates in .NET. Successor of Nustache.

Jul 26, 2016

Game

• UrhoSharp (⭐455) - UrhoSharp is a C# implementation of the Urho3D game engine that runs on iOS, Mac, Windows, Android and Linux systems

Internationalization

• MessageFormat.NET (⭐143) - ICU MessageFormat implementation in .NET lets you write contextual UI messages (PCL library)

Jul 25, 2016

Authentication and Authorization

• OAuth (⭐74) - A very lightweight library for generating OAuth 1.0a signatures written in C#

Jul 08, 2016

Logging

• Exceptionless (⭐507) - Exceptionless .NET Client

Jul 01, 2016

Code Analysis and Metrics

• Metrics-Net (⭐632) - Capturing CLR and application-level metrics. So you know what's going on.

Jun 30, 2016

Queue

• Warewolf ESB (⭐261) - An easy to use service bus and microservices platform. Easily build applications and services in a visual IDE.

Testing

• FakeItEasy (⭐1.4k) - The easy mocking library for .NET https://fakeiteasy.github.io

Jun 29, 2016

Minification

• Web Markup Minifier (⭐409) - .NET library that contains a set of markup minifiers. The objective of this project is to improve the performance of web applications by reducing the size of HTML, XHTML and XML code.

Jun 25, 2016

Git Tools

• Git Credential Manager for Windows (⭐2.8k) - Helps solving issues of credentials, made by Microsoft

Jun 11, 2016

Cryptography

• Pkcs11Interop (⭐231) - Managed .NET wrapper for unmanaged PKCS#11 libraries that provide access to the cryptographic hardware

Jun 10, 2016

Application Templates

• ASP.NET Core Starter Kit (⭐1.1k) - backend: .NET Core, EF Core, C#; frontend: Babel, Webpack, React, CSS Modules

Jun 05, 2016

Compression

• Snappy.Sharp (⭐130) - An implementation of Google's Snappy compression algorithm in C#.

May 27, 2016

Documentation

• Sandcastle (⭐2k) - Sandcastle Help File Builder similar to NDoc

May 07, 2016

Misc

• ReactJS.NET (⭐2.2k) - ReactJS.NET is a library that makes it easier to use Babel along with Facebook's React and JSX from C#.

Apr 30, 2016

Mathematics

• Microsoft Automatic Graph Layout (⭐1.3k) - A set of tools for graph layout and viewing.

Apr 28, 2016

GUI

• Xamarin.Forms (⭐5.7k) - Build native UIs for iOS, Android and Windows from a single, shared C# codebase.

Apr 27, 2016

Tools

• Opserver (⭐4.3k) - Stack Exchange's Monitoring System

Apr 25, 2016

Source Generator

• awesome-analyzers (⭐423) - A curated list of .NET Compiler Platform ("Roslyn") diagnostic analyzers and code fixes.

Apr 20, 2016

API

• Mobius: C# API for Spark (⭐941) - Mobius adds C# language binding to Apache Spark, enabling the implementation of Spark driver code and data processing operations in C#.

Apr 09, 2016

Documentation

• DocFX (⭐3.5k) - Tools for building and publishing API documentation for .NET projects

Apr 05, 2016

Tools

• Myrtille (⭐1.6k) - A native HTML4/5 Remote Desktop Protocol client, HTTP gateway written in C# for .NET

Mar 29, 2016

Tools

• ShareX (⭐24k) - ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to over 80 supported destinations you can choose from.

Mar 16, 2016

MVVM

• Prism (⭐5.6k) - A cross-platform desktop and mobile MVVM development framework.

Feb 22, 2016

Database Drivers

• Firebird.NET - The .NET Data provider is written in C# and provides a high-performance, native implementation of the Firebird API

Markdown Processors

• MarkdownSharp - Open source C# implementation of Markdown processor, as featured on Stack Overflow.

State machines

• Stateless (⭐4.8k) - Create state machines and lightweight state machine-based workflows directly in .NET code

Feb 21, 2016

API

• ServiceStack (⭐5.2k) - Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all

Scheduling

• NCrontab (⭐786) - Class library for parsing & formatting crontab expressions as well as calculating occurrences of time based on a crontab schedule

Feb 18, 2016

Scheduling

• FluentScheduler (⭐2.5k) - Task scheduler with fluent interface that runs automated jobs from your application

Feb 09, 2016

Logging

• ELMAH - Official ELMAH site

Jan 18, 2016

Source Generator

• .NET-libraries-that-make-your-life-easier (⭐733) - Open Source .NET libraries that make your life easier

Jan 13, 2016

Distributed Computing

• Orleans (⭐9.3k) - Orleans is a framework that provides a straight-forward approach to building distributed high-scale computing applications, without the need to learn and apply complex concurrency or other scaling patterns. It was created by Microsoft Research.

Jan 08, 2016

Image Processing

• DotImaging (⭐310) - Minimalistic .NET imaging portable platform

Dec 08, 2015

ORM

• AsyncPoco (⭐127) - A long-"awaited" fully asynchronous PetaPoco fork

• NPoco (⭐821) - Simple microORM that maps the results of a query onto a POCO object. Based on Schotime's branch of PetaPoco

Dec 04, 2015

Database Drivers

• RethinkDb.Driver (⭐378) - A RethinkDB database driver in C# striving for 100% ReQL API compatibility and completeness.

Testing

• Bogus (⭐7.3k) - A simple and sane fake data generator for C#. Based on and ported from the famed faker.js.

Dec 02, 2015

Application Frameworks

• peasy (⭐484) - Peasy is a middle tier framework that offers an easy to use and flexible rules engine and was designed to address common challenges such as concurrency handling, transactional support, fault tolerance, threading, scalability, async and multiple client support, and easy testability, all without a huge learning curve!

IoC

• Simple Injector (⭐1.1k) - Simple Injector is an easy-to-use Dependency Injection (DI) library for .NET 4+ that supports Silverlight 4+, Windows Phone 8, Windows 8 including Universal apps and Mono.

Serialization

• Bond (⭐2.5k) - cross-platform framework for working with schematized data. It supports cross-language de/serialization and powerful generic mechanisms for efficiently manipulating data.

Testing

• FsCheck (⭐1.1k) - Random Testing for .NET.

Dec 01, 2015

ORM

• ServiceStack.OrmLite (⭐1.5k) - Light, simple and fast convention-based POCO ORM [Free for OSS (⭐1.5k)] [$]

Nov 30, 2015

Source Generator

• C# Algorithms, Data Structures (⭐5.5k) - A list of algorithms and data structures implementations.

Nov 29, 2015

Git Tools

• GitLink (⭐555) - let's users step through their code hosted on GitHub or BitBucket

HTML and CSS

• AngleSharp (⭐4.6k) - Complete HTML5 DOM and CSS3 OM construction

Logging

• Elmah MVC (⭐268) - Elmah for MVC

Metrics

• C# StatsD Client (⭐110) - C# client for Etsy's StatsD

Misc

• CsvHelper (⭐4.1k) - Library to help reading and writing CSV files https://github.com/JoshClose/CsvHelper (⭐4.1k)

• Humanizer (⭐7.7k) - Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities

ORM

• Massive (⭐1.8k) - A small, happy, data access tool that will love you forever.

Queue

• EasyNetQ (⭐2.7k) - An easy to use .NET API for RabbitMQ

Search

• Elasticsearch .NET (⭐3.4k) - Elasticsearch.Net & NEST

Nov 28, 2015

Misc

• Shielded (⭐228) - Software Transactional Memory (STM) implementation for .NET

WebSocket

• SignalR (⭐8.9k) - Library for ASP.NET developers that makes it incredibly simple to add real-time web functionality to your applications

• SuperSocket (⭐3.6k) - SuperSocket is a light weight extensible socket application framework

Nov 21, 2015

Testing

• ExpressionToCode (⭐146) - Use plain C# syntax in assertions that include both the expression expression and subexpression values in the failure message.

Nov 01, 2015

Caching

• CacheManager (⭐2.2k) - A common interface and abstraction layer for caching.

Oct 29, 2015

Static Site Generators

• FsBlog (⭐132) - Blog aware, static site generation using F#

Testing

• FluentAutomation (⭐233) - Simple Fluent API for UI Automation

Oct 25, 2015

Deployment

• DbUp (⭐1.9k) - .NET library that helps you to deploy changes to SQL Server databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date

Office

• ExcelDna (⭐1k) - ExcelDna makes it easier to create and deploy Excel Add-Ins using C#, F# or VB .NET

Oct 23, 2015

Micro Framework

• .NET Micro Framework Interpreter (⭐478) - Microsoft® .NET Micro Framework (NETMF) for developing embedded applications on small devices using Visual Studio

Oct 13, 2015

Markdown Processors

• CommonMark.NET (⭐990) - Implementation of CommonMark specification in C# for converting Markdown documents to HTML. Optimized for maximum performance and portability.

Oct 09, 2015

CMS

• Orchard (⭐2.3k) - Free, open source, community-focused project aimed at delivering applications and reusable components on the ASP.NET platform

• Umbraco (⭐3.9k) - Umbraco is a free open source Content Management System built on the ASP.NET platform

Testing

• BDDfy (⭐399) - BDDfy is the simplest BDD framework EVER!

Oct 04, 2015

Application Templates

• Side-Waffle (⭐654) - Large collection of useful templates for Web and Desktop development.

• Template10 (⭐1.4k) - Windows 10 templates with design patterns.

Oct 01, 2015

Git Tools

• posh-git (⭐6.9k) - A PowerShell environment for Git

Sep 30, 2015

Source Generator

• awesome-LINQ (⭐386) - A curated collection of awesome LINQ libraries, tools, and more.

Sep 23, 2015

Push Notifications

• PushSharp (⭐4.4k) - A server-side library for sending Push Notifications to iOS, OSX, Android, Chrome, Windows Phone, Windows 8, Blackberry, and Amazon devices.

Sep 22, 2015

Static Site Generators

• Pretzel (⭐599) - A site generation tool (and then some) for .NET platforms

Sep 21, 2015

Image Processing

• Emgu CV - Cross-platform .NET wrapper for the OpenCV library.

Sep 13, 2015

Graphics

• NGraphics (⭐690) - NGraphics is a cross-platform library for rendering vector graphics on .NET

Sep 10, 2015

Game

• Duality (⭐1.4k) - Duality is a 2D game development framework. Focused on modularity, comes with a visual editor.

Aug 26, 2015

Artificial Intelligence

• AIMLBot (Program#) - A small, fast, standards-compliant yet easily customizable implementation of an AIML (Artificial Intelligence Markup Language) based chatter bot in C#.

Aug 20, 2015

Compilers, Transpilers and Languages

• ClojureCLR (⭐1.5k) - A port of Clojure to the CLR, part of the Clojure project

Aug 19, 2015

Compilers, Transpilers and Languages

• Mono-basic (⭐101) - Visual Basic Compiler and Runtime

• Netjs (⭐945) - .NET to TypeScript and JavaScript compiler. Portable Class Libraries work great for this. You can even pass EXEs.

Aug 18, 2015

Testing

• Machine.Specifications (⭐864) - Machine.Specifications (MSpec) is a context/specification framework that removes language noise and simplifies tests.

• Moq (⭐5.2k) - The most popular and friendly mocking framework for .NET

• NBuilder (⭐52) - Rapid generation of test objects

• Rhino Mocks (⭐255) - Dynamic Mocking Framework for .NET

Aug 16, 2015

SDK and API Clients

• Azure PowerShell (⭐3.6k) - A set of PowerShell cmdlets for developers and administrators to develop, deploy and manage Microsoft Azure applications

Aug 14, 2015

Machine Learning and Data Science

• numl (⭐425) - Designed to include the most popular supervised and unsupervised learning algorithms while minimizing the friction involved with creating the predictive models.

Aug 03, 2015

Image Processing

• MetadataExtractor (⭐780) - Extracts Exif, IPTC, XMP, ICC and other metadata from image files.

Jul 24, 2015

Cryptography

• StreamCryptor (⭐126) - Stream encryption & decryption with libsodium and protobuf

ORM

• LINQ to DB (⭐2.6k) - The fastest LINQ database access library offering a simple, light, fast, and type-safe layer between your POCO objects and your database.

Jul 16, 2015

Testing

• Shouldly (⭐1.9k) - Shouldly is an assertion framework which focuses on giving great error messages when the assertion fails while being simple and terse.

Jul 13, 2015

Misc

• AzureCrawler (⭐43) - Take HTML Snapshots for your Angular, Ember, Durandal or any JavaScript applications

Jul 10, 2015

GUI

• Fluent.Ribbon (⭐2.2k) - Fluent Ribbon Control Suite is a library that implements an Office- and Windows 8-like Ribbon for WPF.

Jul 06, 2015

Authentication and Authorization

• IdentityModel - Helper library for identity & access control in .NET 4.5 and MVC4/Web API.

• IdentityServer - Extensible OAuth2 and OpenID Connect provider framework.

Jun 29, 2015

Compilers, Transpilers and Languages

• F# (⭐2.2k) - The F# compiler, core library and tools - a functional programming language for safer, faster, better code writing.

Cryptography

• BouncyCastle - Together with the .Net System.Security.Cryptography, the reference implementation for cryptographic algorithms on the CLR.

HTTP

• RestEase (⭐961) - Easy-to-use typesafe REST API client library, which is simple and customisable. Heavily inspired by Refit

Queue

• Rebus (⭐2k) - Rebus is a lean service bus implementation for .NET, similar in nature to NServiceBus and MassTransit, only leaner

Jun 20, 2015

Application Templates

• ProjectScaffold (⭐517) - A prototypical .NET solution recommended by the F# Foundation---includes file system setup, Paket for dependencies and FAKE for build/test automation. By default, build process also compiles documentation and generates NuGet packages.

MVVM

• Stylet (⭐889) - Minimal MVVM framework inspired by Caliburn Micro, with good documentation, high test coverage, and its own IoC container

Jun 18, 2015

MVVM

• MVVMCross (⭐3.8k) - Cross-platform mvvm mobile development framework for WPF, Silverlight for WP7 and WP8, Mono for Android, MonoTouch for iOS, Windows Universal projects (WPA8.1 and Windows 8.1 Store apps). Makes extensive use of Portable Class Libraries (PCL) to provide maintainable cross platform C# native applications.

Jun 02, 2015

GUI

• Dragablz (⭐2k) - Dragable, tearable WPF tab control (similar to Chrome) which supports layouts and is full themeable, including themese compatible with MahApps and Material Design.

Visual Studio Plugins

• Git Diff Margin (⭐280) - Displays live Git changes of the currently edited file on Visual Studio margin and scroll bar

May 28, 2015

Template Engine

• Nustache (⭐577) - Open source library for logic-less templates

• DotLiquid (⭐972) - C# port of the Ruby Liquid templating language

May 20, 2015

Cryptography

• libsodium-net - libsodium for .NET - A secure cryptographic library

Apr 22, 2015

Assembly Manipulation

• Mono.Cecil (⭐2.5k) - Cecil is a library to generate and inspect programs and libraries in the ECMA CIL form.

Mar 04, 2015

Web Servers

• XSP (⭐192) - Mono's ASP.NET hosting server. This module includes an Apache Module, a FastCGI module that can be hooked to other web servers as well as a standalone server used for testing (similar to Microsoft's Cassini)

Feb 27, 2015

Application Frameworks

• Mono-Addins (⭐157) - Mono.Addins is a generic framework for creating extensible applications, and for creating add-ins which extend those applications

Compression

• SharpCompress (⭐2k) - SharpCompress is a compression library for .NET/Mono/Silverlight/WP7 that can unrar, un7zip, unzip, untar unbzip2 and ungzip with forward-only reading and file random access APIs. Write support for zip/tar/bzip2/gzip are implemented

Game

• CocosSharp (⭐488) - CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs

Git Tools

• NGit (⭐256) - NGit is a port of JGit to C#

GUI

• XWT (⭐1.3k) - A cross-platform UI toolkit for creating desktop applications with .NET and Mono

• Gtk# (⭐414) - Gtk# is a Mono/.NET binding to the cross platform Gtk+ GUI toolkit and the foundation of most GUI apps built with Mono

Interoperability

• CppSharp (⭐2.6k) - Tools to surface C++ APIs to C#

• Sharpen (⭐366) - Sharpen is an Eclipse plugin created by db4o that allows you to convert your Java project into C#

• CXXI (⭐196) - C++ interop framework

Media

• TagLib# (⭐1.1k) - TagLib# (aka taglib-sharp) is a library for reading and writing metadata in media files, including video, audio, and photo formats

Feb 24, 2015

Compilers, Transpilers and Languages

• Roslyn (⭐17k) - The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs. It enables building code analysis tools with the same APIs that are used by Visual Studio.

Office

• Open XML SDK (⭐3.5k) - The Open XML SDK provides open-source libraries for working with Open XML Documents (DOCX, XLSX, and PPTX).

Visual Studio Plugins

• CodeContracts (⭐876) - Source code for the CodeContracts tools for .NET

Feb 17, 2015

Machine Learning and Data Science

• Accord.NET Extensions (⭐334) - Advanced image processing and computer vision algorithms made as fluent extensions.

Jan 13, 2015

Machine Learning and Data Science

• Accord.NET - Machine learning framework combined with audio and image processing libraries (computer vision, computer audition, signal processing and statistics).

• AForge.NET - Framework for developers and researchers in the fields of Computer Vision and Artificial Intelligence (image processing, neural networks, genetic algorithms, machine learning, robotics).

Dec 27, 2014

Graphics

• Oxyplot - OxyPlot is a cross-platform plotting library for .NET

IoC

• LightInject (⭐586) - A ultra lightweight IoC container

Nov 27, 2014

GUI

• AvalonEdit (⭐1.6k) - The WPF-based text editor component used in SharpDevelop

Nov 21, 2014

GIS

• NetTopologySuite (⭐1.2k) A .NET GIS solution that is fast and reliable for the .NET platform

Sep 22, 2014

E-Commerce and Payments

• ServiceStack.Stripe (⭐194) - Typed .NET clients for stripe.com REST APIs

Aug 27, 2014

GUI

• ObjectListView - ObjectListView is a C# wrapper around a .NET ListView. It makes the ListView much easier to use and teaches it some new tricks

MVVM

• ReactiveUI (⭐7.5k) - An MVVM framework for .NET that integrates the Reactive Extensions (Rx) framework, enabling developers to build elegant, testable applications using WPF, Windows Store Apps, WP8 or Xamarin.

Aug 04, 2014

Queue

• Hangfire (⭐8.3k) - Incredibly easy way to perform fire-and-forget, delayed and recurring tasks inside ASP.NET applications

Jul 26, 2014

IoC

• Spring.Net (⭐804) - Spring.NET is an open source application framework that makes building enterprise .NET applications easier

Jul 24, 2014

Mail

• MailKit (⭐5.4k) - A complete cross-platform mail stack including IMAP, POP3, SMTP, authentication and more. Built on top of MimeKit.

• MimeKit (⭐1.6k) - A cross-platform .NET MIME creation and parser library with support for S/MIME, PGP, TNEF and Unix mbox spools.

Profiler

• Glimpse (⭐2.3k) - The open source diagnostics platform for the web

Jul 22, 2014

Application Frameworks

• ASP.NET Boilerplate (⭐11k) - A starting point for new modern ASP.NET MVC web applications with best practices and most popular tools.

Jul 21, 2014

GUI

• Callisto (⭐340) - A control toolkit for Windows 8 XAML applications. Contains some UI controls to make it easier to create Windows UI style apps for the Windows Store in accordance with Windows UI guidelines.

Profiler

• MiniProfiler (⭐2.7k) - A simple but effective mini-profiler for ASP.NET websites

Scheduling

• QuartzNet (⭐5.7k) - Quartz Enterprise Scheduler .NET

Template Engine

• RazorEngine (⭐2.1k) - Open source templating engine based on Microsoft's Razor parsing engine

Jul 20, 2014

Database

• BrightstarDb (⭐452) - BrightstarDB is a native .NET RDF triple store

MVVM

• Caliburn.Micro (⭐2.6k) - A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability.

Serialization

• Json.NET (⭐10k) - Popular high-performance JSON framework for .NET

• ServiceStack.Text (⭐1.2k) - JSON, JSV and CSV Text Serializers used in servicestack.net

• Msgpack-Cli (⭐798) - MessagePack implementation for Common Language Infrastructure

Jul 19, 2014

Build Automation

• Invoke-Build (⭐563) - PowerShell build and test automation tool inspired by Psake.

Logging

• StackExchange.Exceptional (⭐852) - Error handler used for the Stack Exchange network

Queue

• MassTransit (⭐5.5k) - MassTransit is lean service bus implementation for building loosely coupled applications using the .NET Framework.

Jul 18, 2014

Logging

• Serilog (⭐6.3k) - A no-nonsense logging library for the NoSQL era. Combines the best of traditional and structured diagnostic logging in an easy-to-use package.

Jul 17, 2014

IDE

• SharpDevelop (⭐2k) - A free IDE for .NET programming languages

Jul 16, 2014

API

• WebAPI Contrib (⭐774) - Collection of open source projects to help improve your work with ASP.NET Web API

Assets

• Cassette (⭐537) - Manages .NET web application assets (scripts, css and templates)

• Bundler (⭐266) - Compile & Minify Less/Sass/Stylus/Css/JS/CoffeeScript/LiveScript files. Integrates with MVC and ServiceStack

Authentication and Authorization

• DotNetOpenAuth (⭐1.7k) - A C# implementation of the OpenID, OAuth and InfoCard protocols

Build Automation

• Psake (⭐1.5k) - .NET-based build automation tool written in PowerShell

Caching

• CacheCow (⭐825) - An ASP.NET Web API HTTP caching implementation both on client and server

Code Analysis and Metrics

• Gendarme (⭐78) - Extensible rule-based tool to find problems in .NET applications and libraries

Database Drivers

• MySQL Connector - Connector/Net is a fully-managed ADO.NET driver for MySQL

Internationalization

• i18n (⭐546) - Smart internationalization for ASP.NET MVC

IoC

• Castle Windsor (⭐1.5k) - Castle Windsor is best of breed, mature Inversion of Control container available for .NET and Silverlight

• Autofac (⭐4.2k) - An addictive .NET IoC container

Logging

• Log4Net - The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets

ORM

• Dapper Extensions (⭐1.7k) - Small library that complements Dapper by adding basic CRUD operations (Get, Insert, Update, Delete) for your POCOs

• NHibernate - NHibernate Object Relational Mapper

Queue

• NServiceBus (⭐2k) - The most popular service bus for .NET

• NetMQ (⭐2.7k) - NetMQ is 100% native C# port of ZeroMQ

SDK and API Clients

• AWS SDK (⭐1.9k) - The AWS SDK for .NET enables .NET developers to easily work with Amazon Web Services

• Octokit.NET (⭐2.5k) - A GitHub API client library for .NET

Testing

• AutoFixture (⭐3k) - AutoFixture is an open source framework for .NET designed to minimize the 'Arrange' phase of your unit tests

Web Servers

• EmbedIO (⭐1.4k) - Web server built on Mono and cross-platform

WebSocket

• Fleck (⭐2.1k) - Fleck is a WebSocket server implementation in C#. Branched from the Nugget project

• Websocket-Sharp (⭐5.1k) - A C# implementation of the WebSocket protocol client and server