Software / Backups

• Shield (⭐397) - A pluggable architecture for backup and restore of database systems. MIT Go

Software / Build and software organization tools

• Environment Modules - Environment Modules provides for the dynamic modification of a user's environment via modulefiles. (Source Code (⭐848)) GPL-2.0 Tcl

Software / Continuous Integration & Continuous Deployment

• Harness - End-to-end developer platform with Source Control Management, CI/CD Pipelines, Hosted Developer Environments, and Artifact Registries (fork of Drone). (Source Code (⭐36k)) Apache-2.0 Go

Software / Deployment Automation

• Genesis (⭐63) - A template framework for multi-environment BOSH deployments. MIT Perl

Software / DNS - Control Panels & Domain Management

• DNSControl - Synchronize your DNS to multiple providers from a simple DSL. (Source Code (⭐3.8k)) MIT Go/Docker

• octoDNS (⭐3.7k) - DNS as code - Tools for managing DNS across multiple providers. MIT Python

Software / Identity Management - LDAP

• lldap (⭐6.2k) - Light (simplified) LDAP implementation with a simple, intuitive web interface and GraphQL support. GPL-3.0 Rust

Software / Metrics & Metric Collection

• Statsd (⭐18k) - Daemon that listens for statistics like counters and timers, sent over UDP or TCP, and sends aggregates to one or more pluggable backend services. MIT Nodejs

Software / Monitoring & Status Pages

• EdMon (⭐11) - A command-line monitoring application helping you to check that your hosts and services are available, with notifications support. MIT Java

• Linux Dash (⭐11k) - A low-overhead monitoring web dashboard for a GNU/Linux machine. MIT Nodejs/Go/Python/PHP

Software / Packaging

• tito (⭐398) - Builds RPMs for git-based projects. GPL-2.0 Python

Software / Software Containers

• Incus - Container "hypervisor" and a better UX for LXC. (Source Code (⭐5.5k)) Apache-2.0 Go

Software / Automation

• OpenBolt - Orchestration tool to run orchestration workflows or one-off tasks/scripts to automate the provisioning and management of nodes. Community fork of the last open source version of Puppet Bolt. (Source Code (⭐23)) Apache-2.0 Ruby

Software / Configuration Management

• CINC - Free distribution of Chef, a configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". (Source Code) Apache-2.0 Ruby

• OpenVox - Community fork of the last open source version of Puppet, a software configuration management tool which includes its own declarative language to describe system configuration. (Source Code (⭐170)) Apache-2.0 Ruby/C

Software / IT Asset Management

• openDCIM - GPL v3 Data Center Inventory Management (DCIM). (Demo, Source Code (⭐356)) GPL-3.0 PHP/JavaScript

Software / Time Servers

• Chrony - A versatile implementation of the Network Time Protocol (NTP). (Source Code) GPL-2.0 C

• NTPsec - A secure, hardened, and improved implementation of Network Time Protocol derived from NTP Classic. (Source Code) BSD-2-Clause C

• OpenNTPD - A FREE, easy to use implementation of the Network Time Protocol. (Source Code (⭐23)) ISC C

• Roughenough (⭐146) - A Roughtime secure time synchronization client and server. MIT/Apache-2.0 Rust

• Statime (⭐297) - A Precision Time Protocol (PTP) implementation in Rust. MIT/Apache-2.0 Rust

Software / Log Management

• reaction - A lightweight daemon that scans program outputs for repeated patterns, and takes action. (Source Code) AGPL-3.0 Rust

Software / Metrics & Metric Collection

• VictoriaMetrics - Fast, cost-effective time series database and monitoring solution; drop-in replacement for Prometheus with PromQL/MetricsQL support. (Source Code (⭐17k)) Apache-2.0 Go

Software / Control Panels

• MeshCentral - A complete web-based remote monitoring and management web site. (Source Code (⭐6.6k)) Apache-2.0 JavaScript/HTML

Software / Monitoring & Status Pages

• CheckCle - Seamless, real-time monitoring of full-stack systems, applications, and infrastructure. (Source Code (⭐2.7k)) MIT Docker

• cState - Static status page for hyperfast Hugo. Clean design, minimal JS, super light HTML/CSS, high customization, optional admin panel, read-only API, IE8+. (Demo, Source Code (⭐2.9k)) MIT HTML

• Gatus - Automated service health dashboard. (Demo, Source Code (⭐11k)) Apache-2.0 Docker/K8S

• Kener - Status page with incident management, easy to use and customize. (Source Code (⭐5k)) MIT Nodejs/Docker

• KuvaszUptime - Performant, stable uptime & SSL monitoring service with brandable status pages, IAC support, Prometheus integration and a complete REST API. (Demo, Source Code (⭐520)) Apache-2.0 Docker

• Nezha - Lightweight, servers & websites monitoring and O&M tool. (Source Code (⭐10k)) Apache-2.0 Go/Shell

• OneUptime - A comprehensive solution for monitoring and managing your online services. (Source Code (⭐7.1k)) Apache-2.0 Docker

Software / Identity Management - LDAP

• LTB Self-Service Password - Web interface to change and reset LDAP passwords. (Source Code (⭐1.3k)) GPL-3.0 PHP

Software / Backups

• Portabase - Server dashboard tool that simplifies the backup and restoration of your database instances. (Source Code (⭐945)) Apache-2.0 Docker

Software / Monitoring & Status Pages

• tirreno - Application-level security to protect your app from threats, fraud, and abuse. (Demo, Source Code (⭐1.4k)) AGPL-3.0 PHP/Docker

Software / Deployment Automation

• FaynoSync - Self-hosted Dynamic Update Server with statistics, supporting multiple updaters. Flexible features for seamless app updates and insights. (Source Code (⭐150), Clients (⭐4)) Apache-2.0 Docker/Go

Software / Backups

• Databasus - PostgreSQL, MySQL, MariaDB and MongoDB backup tool with web UI, external storages (local, S3, FTP, Google Drive, etc.), notifications (webhook, Discord, Slack, etc.) and team management. (Source Code (⭐6.9k)) Apache-2.0 Docker

Software / Monitoring & Status Pages

• Uptime Kuma - Modern, self-hosted monitoring tool with a clean UI and rich notification support. (Source Code (⭐88k)) MIT Nodejs

Software / Router

• IPFire - Free network firewall distribution, based on the Linux operating system with easy-to-use web management console. (Source Code) GPL-2.0 Shell/PHP/Other

Software / Backups

• Minarca - Client–server backup platform with a centralized web console to manage and restore Linux, Windows, and macOS backups via GUI or CLI. (Source Code) AGPL-3.0 Python

Software / Continuous Integration & Continuous Deployment

• ArgoCD - Declarative, GitOps continuous delivery tool for Kubernetes. (Source Code (⭐23k)) Apache-2.0 Go

Software / Configuration Management

• cloud-init - Initialization tool to automate the configuration of VMs, cloud instances, or machines on a network. (Source Code (⭐3.7k)) GPL-3.0/Apache-2.0 Python

Software / Monitoring & Status Pages

• Beszel - Lightweight server monitoring platform that includes Docker statistics, historical data, and alert functions. (Source Code (⭐22k)) MIT Go

Software / Backups

• Backrest - Backrest is a web UI and orchestrator for restic backup. (Source Code (⭐6.4k)) GPL-3.0 Docker/Go

Software / Continuous Integration & Continuous Deployment

• Terrateam - GitOps-first automation platform for Terraform and OpenTofu workflows with support for self-hosted runners. (Source Code (⭐1.2k)) MPL-2.0 OCaml/Docker

Software / VPN

• Firezone - WireGuard based VPN Server and Firewall. (Source Code (⭐8.6k)) Apache-2.0 Docker

Software / VPN

• DefGuard - True enterprise WireGuard with MFA/2FA and SSO. (Source Code) Apache-2.0 Rust

Software / Monitoring & Status Pages

• Wazuh - Unified XDR and SIEM protection for endpoints and cloud workloads. (Source Code (⭐16k)) GPL-2.0 C

Software / PaaS

• CapRover - Build your own PaaS in a few minutes. (Demo, Source Code (⭐15k)) Apache-2.0 Docker/Nodejs

• Coolify - An open-source & self-hostable Heroku / Netlify alternative (and even more). (Source Code (⭐56k)) Apache-2.0 Docker

• Dokku - An open-source PaaS (alternative to Heroku). (Source Code (⭐32k)) MIT Docker/Shell/Go/deb

• fx (⭐2.2k) - A tool to help you do Function as a Service with painless on your own servers. MIT Go

• Kubero - A self-hosted Heroku PaaS alternative for Kubernetes that implements GitOps. (Demo, Source Code (⭐4.3k)) GPL-3.0 K8S/Nodejs/Go

• Nhost - Firebase Alternative with GraphQL. Get a database and backend configured and ready in minutes. (Source Code (⭐9.2k)) MIT Docker/Nodejs/Go

• OpenFaaS - Serverless Functions Made Simple for Docker & Kubernetes. (Source Code (⭐26k)) MIT Go

• Tau - Easily build Cloud Computing Platforms with features like Serverless WebAssembly Functions, Frontend Hosting, CI/CD, Object Storage, K/V Database, and Pub-Sub Messaging. (Source Code (⭐5k)) BSD-3-Clause Go/Rust/Docker

• Trusted-CGI (⭐248) - Lightweight self-hosted lambda/applications/cgi/serverless-functions platform. MIT Go/deb/Docker

Software / Configuration Management

• Rudder - Scalable and dynamic configuration management system for patching, security & compliance, based on CFEngine. (Source Code (⭐679)) GPL-3.0 Scala

Software / Mail Clients

• aerc - Terminal MUA with a focus on plaintext and features for developers. (Source Code) MIT Go

External links / Websites

• Cloud Native Software Landscape - Compilation of software and tools for cloud computing.

Software / Monitoring & Status Pages

• openITCOCKPIT Community Edition - Monitoring Suite featuring seamless integrations with Naemon, Checkmk, Grafana and more. (Demo, Source Code (⭐376)) GPL-3.0 deb/Docker

Software / Control Panels

• HestiaCP - Web server control panel (fork of VestaCP). (Demo, Source Code (⭐4.4k)) GPL-3.0 PHP/Shell/Other

Software / Build and software organization tools

• Lmod - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem. (Source Code (⭐597)) MIT Lua

Software / Continuous Integration & Continuous Deployment

• GitLab CI - Gitlab's built-in, full-featured CI/CD solution. (Source Code) MIT Ruby

Software / Distributed Filesystems

• Ceph - Distributed object, block, and file storage platform. (Source Code (⭐17k)) LGPL-3.0 C++

Software / Monitoring & Status Pages

• glances - Open-source, cross-platform real-time monitoring tool with CLI and web dashboard interfaces and many exporting options. (Source Code (⭐33k)) GPL-3.0 Python

Software / Automation

• Apache Maven - Build automation tool mainly for Java. A software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project's build, reporting and documentation from a central piece of information. (Source Code (⭐5.1k)) Apache-2.0 Java

• Bazel - A fast, scalable, multi-language and extensible build system. Used by Google. (Source Code (⭐25k)) Apache-2.0 Java

• GNU Make - The most popular automation build tool for many purposes, make is a tool which controls the generation of executables and other non-source files of a program from the program's source files. (Source Code) GPL-3.0 C

• Gradle - Another build automation system. (Source Code (⭐19k)) Apache-2.0 Groovy/Java

Software / Build and software organization tools

• EasyBuild - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way. (Source Code (⭐445)) GPL-2.0 Python

Software / ChatOps

• Eggdrop - The oldest Internet Relay Chat (IRC) bot still in active development. (Source Code (⭐572)) GPL-2.0 C

• Errbot - Plugin based chatbot designed to be easily deployable, extensible and maintainable. (Source Code (⭐3.3k)) GPL-3.0 Python

Software / Configuration Management Database

• Collins - At Tumblr, it's the infrastructure source of truth and knowledge. (Source Code (⭐575)) Apache-2.0 Docker/Scala

• i-doit - IT Documentation and CMDB. AGPL-3.0 PHP

• iTop - Complete ITIL web based service management tool. (Source Code) AGPL-3.0 PHP

• netbox - IP address management (IPAM) and data center infrastructure management (DCIM) tool. (Demo, Source Code (⭐21k)) Apache-2.0 Python

Software / Continuous Integration & Continuous Deployment

• Buildbot - Python-based toolkit for continuous integration. (Source Code (⭐5.4k)) GPL-2.0 Python

• GoCD - Continuous delivery server. (Source Code (⭐7.4k)) Apache-2.0 Java/Ruby

• Laminar - Fast, lightweight, simple and flexible Continuous Integration. (Source Code (⭐342)) GPL-3.0 C++

• Strider - Open Source Continuous Deployment / Continuous Integration platform. (Source Code (⭐4.6k)) MIT Nodejs

Software / Control Panels

• Ajenti - Control panel for Linux and BSD. (Source Code (⭐7.9k)) MIT Python/Shell

• Cockpit - Web-based graphical interface for servers. (Source Code (⭐14k)) LGPL-2.1 C

• ISPConfig - Manage Linux servers directly through your browser. (Source Code) BSD-3-Clause PHP

• Sentora - Open-Source Web hosting control panel for Linux, BSD (fork of ZPanel). (Source Code (⭐674)) GPL-3.0 PHP

• Virtualmin - Powerful and flexible web hosting control panel for Linux and BSD systems. (Source Code) GPL-3.0 Shell/Perl/Other

• Webmin - Web-based interface for system administration for Unix. (Source Code (⭐5.8k)) BSD-3-Clause Perl

Software / Deployment Automation

• Capistrano - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based). (Source Code (⭐13k)) MIT Ruby

• CloudSlang - Flow-based orchestration tool for managing deployed applications, with Docker capabilities. (Source Code (⭐93)) Apache-2.0 Java

• CloudStack - Cloud computing software for creating, managing, and deploying infrastructure cloud services. (Source Code (⭐2.9k)) Apache-2.0 Java/Python

• Cobbler - Cobbler is a Linux installation server that allows for rapid setup of network installation environments. (Source Code (⭐2.8k)) GPL-2.0 Python

• Fabric - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks. (Source Code (⭐15k)) BSD-2-Clause Python

• Overcast - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH. (Source Code (⭐482)) MIT Nodejs

Software / DNS - Servers

• djbdns - A collection of DNS applications, including tinydns. (Source Code) CC0-1.0 C

Software / Editors

• Brackets - Code editor for web designers and front-end developers. (Source Code (⭐1.5k)) MIT JavaScript

• Eclipse - IDE written in Java with an extensible plug-in system. (Source Code) EPL-1.0 Java

• Geany - GTK2 text editor. (Source Code (⭐3.6k)) GPL-2.0 C/C++

• GNU Emacs - An extensible, customizable text editor-and more. (Source Code (⭐5.1k)) GPL-3.0 C

• Nano - Easy to use, customizable text editor. (Source Code) GPL-3.0 C

• TextMate - A graphical text editor for OS X. (Source Code (⭐15k)) GPL-3.0 C++

• Vim - A highly configurable text editor built to enable efficient editing. (Source Code (⭐40k)) Vim C

• VSCodium - An open source cross-platform extensible code editor based on VS Code by Microsoft removing their non-free additions. (Source Code (⭐32k)) MIT TypeScript

Software / Identity Management - Tools and web interfaces

• ZITADEL - Cloud-native Identity & Access Management solution providing a platform for secure authentication, authorization and identity management. (Source Code (⭐14k)) Apache-2.0 Go/Docker/K8S

Software / IT Asset Management

• OPSI - Hardware and software inventory, client management, deployment, and patching for Linux and Windows. (Source Code) GPL-3.0/AGPL-3.0 OVF/Python

• RackTables - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration. (Demo, Source Code (⭐805)) GPL-2.0 PHP

Software / Mail Clients

• Sylpheed - Still developed predecessor to Claws Mail, lightweight mail client. (Source Code (⭐177)) GPL-2.0 C

Software / Miscellaneous

• Clonezilla - Partition and disk imaging/cloning program. (Source Code) GPL-2.0 Perl/Shell/Other

• DadaMail - Mailing List Manager, written in Perl. (Source Code) GPL-2.0 Perl

• phpList - Newsletter and email marketing software. (Source Code (⭐848)) AGPL-3.0 PHP

Software / Monitoring & Status Pages

• Cacti - Web-based network monitoring and graphing tool. (Source Code (⭐1.8k)) GPL-2.0 PHP

• eZ Server Monitor - A lightweight and simple dashboard monitor for Linux, available in Web and Bash application. (Source Code (⭐360)) GPL-3.0 PHP/Shell

• LibreNMS - Fully featured network monitoring system that provides a wealth of features and device support. (Source Code (⭐4.7k)) GPL-3.0 PHP

• Monit - Small utility for managing and monitoring Unix systems. (Source Code) AGPL-3.0 C

• Munin - Networked resource monitoring tool. (Source Code (⭐2.1k)) GPL-2.0 Perl/Shell

• Naemon - Network monitoring tool based on the Nagios 4 core with performance enhancements and new features. (Source Code (⭐169)) GPL-2.0 C

• Observium Community Edition - Network monitoring and management platform that provides real-time insight into network health and performance. QPL-1.0 PHP

• Riemann - Flexible and fast events processor allowing complex events/metrics analysis. (Source Code (⭐4.3k)) EPL-1.0 Java

• Thruk - Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken. (Source Code (⭐438)) GPL-1.0 Perl

• Zabbix - Enterprise-class software for monitoring of networks and applications. (Source Code) GPL-2.0 C

Software / Network Configuration Management

• phpIPAM - Open source IP address management with PowerDNS integration. (Source Code (⭐2.7k)) GPL-3.0 PHP

• RANCID - Monitor network devices configuration and maintain history of changes. (Source Code (⭐136)) BSD-3-Clause Perl/Shell

• rConfig - Network device configuration management tool. (Source Code (⭐181)) GPL-3.0 PHP

Software / Service Discovery

• ZooKeeper - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. (Source Code (⭐13k)) Apache-2.0 Java/C++

Software / Troubleshooting

• mitmproxy - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems. (Source Code (⭐44k)) MIT Python

• Sysdig - Capture system state and activity from a running Linux instance, then save, filter and analyze. (Source Code (⭐8.3k)) Apache-2.0 Docker/Lua/C

Software / Version control

• Darcs - Cross-platform version control system, like git, mercurial or svn but with a very different approach: focus on changes rather than snapshots. (Source Code) GPL-2.0 Haskell

• Fossil - Distributed version control with built-in wiki and bug tracking. (Source Code) BSD-2-Clause C

• Git - Distributed revision control and source code management (SCM) with an emphasis on speed. (Source Code (⭐61k)) GPL-2.0 C

• Subversion - Client-server revision control system. (Source Code) Apache-2.0 C

Software / Virtualization

• Ganeti - Cluster virtual server management software tool built on top of KVM and Xen. (Source Code (⭐574)) BSD-2-Clause Python/Haskell

• KVM - Linux kernel virtualization infrastructure. (Source Code) GPL-2.0/LGPL-2.0 C

• OpenNebula - Build and manage enterprise clouds for virtualized services, containerized applications and serverless computing. (Source Code (⭐1.7k)) Apache-2.0 C++

• oVirt - Manages virtual machines, storage and virtual networks. (Source Code) Apache-2.0 Java

• QEMU - QEMU is a generic machine emulator and virtualizer. (Source Code) LGPL-2.1 C

• XCP-ng - Virtualization platform based on Xen Source and Citrix® Hypervisor (formerly XenServer). (Source Code) GPL-2.0 C

• Xen - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures. (Source Code) GPL-2.0 C

Software / VPN

• ocserv - Cisco AnyConnect-compatible VPN server. (Source Code) GPL-2.0 C

List of Licenses / Web

• AGPL-3.0 - GNU Affero General Public License 3.0

• Apache-2.0 - Apache, Version 2.0

• BSD-2-Clause - BSD 2-clause "Simplified"

• BSD-3-Clause - BSD 3-Clause "New" or "Revised"

• BUSL-1.1 - Business Source License 1.1

• CC0-1.0 - Public Domain/Creative Common Zero 1.0

• CDDL-1.0 - Common Development and Distribution License 1.0

• EPL-1.0 - Eclipse Public License 1.0

• GFDL-1.2 - GNU Free Documentation License 1.2

• GPL-1.0 - GNU General Public License 1.0

• GPL-2.0 - GNU General Public License 2.0

• GPL-3.0 - GNU General Public License 3.0

• IPL-1.0 - IBM Public License v1.0

• ISC - ISC License

• LGPL-2.0 - GNU Lesser General Public License v2

• LGPL-2.1 - GNU Lesser General Public License v2.1

• LGPL-3.0 - GNU Lesser General Public License v3

• MIT - MIT License

• MPL-2.0 - Mozilla Public License

• NLPL - No Limit Public License

• OLDAP-2.8 - Open LDAP Public License v2.8

• QPL-1.0 - Q Public License 1.0

• Vim - Vim License

• Zlib - zlib License

External links / Communities / Forums

• ArsTechnica OpenForum - IT Forum which is attached to a large news site.

External links / Repositories

• AlternativeTo - Find alternatives to software you know and discover new software.

• ElRepo - Community Repo for Enterprise Linux (RHEL, CentOS, etc).

External links / Websites

• Ops School - Comprehensive program that will help you learn to be an operations engineer.

Software / Configuration Management

• Ansible - Provisioning, configuration management, and application-deployment tool. (Source Code (⭐69k)) GPL-3.0 Python

• Salt - Event-driven IT automation, remote task execution, and configuration management software. (Source Code (⭐15k)) Apache-2.0 Python

Software / Diagramming

• Kroki - API for generating diagrams from textual descriptions. (Source Code (⭐4.2k)) MIT Java

Software / Identity Management - Single Sign-On (SSO)

• Authentik - Flexible identity provider with support for different protocols. (OAuth 2.0, SAML, LDAP and Radius). (Source Code (⭐22k)) MIT Python

Software / Service Discovery

• etcd - Distributed K/V-Store, authenticating via SSL PKI and a REST HTTP Api for shared configuration and service discovery. (Source Code (⭐52k)) Apache-2.0 Go

Software / Software Containers

• Docker - Platform for developers and sysadmins to build, ship, and run distributed applications. (Source Code) Apache-2.0 Go

• OpenVZ - Container-based virtualization for Linux. (Source Code) GPL-2.0 C

• Portainer Community Edition - Simple management UI for Docker. (Source Code (⭐38k)) Zlib Go

Software / Backups

• Bareos - Cross-network backup solution which preserves, archives, and recovers data from all major operating systems. (Source Code (⭐1.2k)) AGPL-3.0 C++/C

• Barman - Backup and Recovery Manager for PostgreSQL. (Source Code (⭐3.2k)) GPL-3.0 Python

• BorgBackup - Deduplicating archiver with compression and authenticated encryption. (Source Code (⭐13k)) BSD-3-Clause Python

• Burp - Network backup and restore program. (Source Code (⭐503)) AGPL-3.0 C

• Duplicati - Backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. (Source Code (⭐15k)) LGPL-2.1 C#

• Proxmox Backup Server - Proxmox Backup Server is an enterprise-class, client-server backup solution thatis capable of backing up virtual machines, containers, and physical hosts. (Source Code) GPL-3.0 Rust

• Rdiff-backup - Reverse differential backup tool, over a network or locally. (Source Code (⭐1.3k)) GPL-2.0 Python

• Rsnapshot - Filesystem snapshot utility based on rsync. (Source Code (⭐3.6k)) GPL-2.0 Perl

• UrBackup - Client/Server Open Source Network Backup for Windows, MacOS and Linux. (Source Code (⭐873)) AGPL-3.0 C/C++

Software / DNS - Control Panels & Domain Management

• nsupdate.info - Dynamic DNS service. (Demo, Source Code (⭐1.1k)) BSD-3-Clause Python

• SPF Toolbox - Application to look up DNS records such as SPF, MX, Whois, and more. (Source Code (⭐298)) MIT PHP

Software / Monitoring & Status Pages

• ruptime (⭐206) - Classic system status server. AGPL-3.0 Shell

Software / Packaging

• fpm - Versatile multi format package creator. (Source Code (⭐11k)) MIT Ruby

Software / Queuing

• BeanstalkD - A simple, fast work queue. (Source Code (⭐6.7k)) MIT C

• NSQ - A realtime distributed messaging platform. (Source Code (⭐26k)) MPL-2.0 Go

• ZeroMQ - Lightweight queuing system. (Source Code) GPL-3.0 C++

Software / Remote Desktop Clients

• Remmina - Feature-rich remote desktop application for linux and other unixes. (Source Code) GPL-2.0 C

• Tiger VNC - High-performance, multi-platform VNC client and server. (Source Code (⭐7.2k)) GPL-2.0 C++

• X2go - X2Go is an open source remote desktop software for Linux that uses the NoMachine/NX technology protocol. (Source Code) GPL-2.0 Perl

Software / Router

• pfSense CE - Free network firewall distribution, based on the FreeBSD operating system with a custom kernel and including third party free software packages for additional functionality. (Source Code (⭐5.7k)) Apache-2.0 Shell/PHP/Other

Software / Distributed Filesystems

• DRBD - Distributed replicated storage system, implemented as a Linux kernel driver. (Source Code (⭐704)) GPL-2.0 C

• GlusterFS - Software-defined distributed storage that can scale to several petabytes, with interfaces for object, block and file storage. (Source Code (⭐5.2k)) GPL-2.0/LGPL-3.0 C

• Hadoop Distributed Filesystem (HDFS) - Distributed file system that provides high-throughput access to application data. (Source Code (⭐16k)) Apache-2.0 Java

• Kubo (⭐17k) - Implementation of IPFS, a global, versioned, peer-to-peer filesystem that seeks to connect all computing devices with the same system of files. Apache-2.0/MIT Go

• LeoFS - Highly available, distributed, replicated eventually consistent object/blob store. (Source Code (⭐1.6k)) Apache-2.0 Erlang

• Lustre - Parallel distributed file system, generally used for large-scale cluster computing. (Source Code) GPL-2.0 C

• MooseFS - Fault tolerant, network distributed file system. (Source Code (⭐2k)) GPL-2.0 C

• OpenAFS - Distributed network file system with read-only replicas and multi-OS support. (Source Code) IPL-1.0 C

• Openstack Swift - A highly available, distributed, eventually consistent object/blob store. (Source Code) Apache-2.0 Python

• XtreemFS - Distributed, replicated and fault-tolerant file system for federated IT infrastructures.. (Source Code (⭐347)) BSD-3-Clause Java

Software / Distributed Filesystems

• JuiceFS - Distributed POSIX file system built on top of Redis and S3. (Source Code (⭐14k)) Apache-2.0 Go

Software / Metrics & Metric Collection

• Beats - Single-purpose data shippers that send data from hundreds or thousands of machines and systems to Logstash or Elasticsearch. (Source Code (⭐13k)) Apache-2.0 Go

• Collectd - System statistics collection daemon. (Source Code (⭐3.4k)) MIT C

• Diamond (⭐1.8k) - Daemon that collects system metrics and publishes them to Graphite (and others). MIT Python

• Grafana - A Graphite & InfluxDB Dashboard and Graph Editor. (Source Code (⭐74k)) AGPL-3.0 Go

• Graphite - Scalable graphing server. (Source Code (⭐6.1k)) Apache-2.0 Python

• RRDtool - Industry standard, high performance data logging and graphing system for time series data. (Source Code (⭐1.1k)) GPL-2.0 C

• tcollector - Gathers data from local collectors and pushes the data to OpenTSDB. (Source Code (⭐511)) LGPL-3.0/GPL-3.0 Python

• Telegraf (⭐18k) - Plugin-driven server agent for collecting, processing, aggregating, and writing metrics. MIT Go

Software / Monitoring & Status Pages

• Prometheus - Service monitoring system and time series database. (Source Code (⭐64k)) Apache-2.0 Go

Software / DNS - Control Panels & Domain Management

• Poweradmin - Web-based DNS control panel for PowerDNS server. (Source Code (⭐870)) GPL-3.0 PHP

Software / Automation

• Rake - Build automation tool similar to Make, written in and extensible in Ruby. (Source Code (⭐2.5k)) MIT Ruby

Software / Backups

• Duplicity - Encrypted bandwidth-efficient backup using the rsync algorithm. (Source Code) GPL-2.0 Python

Software / DNS - Servers

• Bind - Versatile, classic, complete name server software. (Source Code) MPL-2.0 C

• dnsmasq - Provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. (Source Code) GPL-2.0 C

• NSD - Authoritative DNS name server developed speed, reliability, stability and security. (Source Code (⭐550)) BSD-3-Clause C

• PowerDNS Authoritative Server - Versatile nameserver which supports a large number of backends. (Source Code (⭐4.4k)) GPL-2.0 C++

• Unbound - Validating, recursive, and caching DNS resolver. (Source Code (⭐4.6k)) BSD-3-Clause C

• Yadifa - Clean, small, light and RFC-compliant name server implementation developed from scratch by .eu. (Source Code (⭐80)) BSD-3-Clause C

Software / Monitoring & Status Pages

• dashdot (⭐3.5k) - A simple, modern server dashboard for smaller private servers. (Demo) MIT Nodejs/Docker

Software / Log Management

• Fluentd - Data collector for unified logging layer. (Source Code (⭐14k)) Apache-2.0 Ruby

• GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal or through the browser. (Source Code (⭐21k)) MIT C

• rsyslog - Rocket-fast system for log processing. (Source Code (⭐2.3k)) GPL-3.0 C

Software / Identity Management - LDAP

• 389 Directory Server - Enterprise-class Open Source LDAP server for Linux. (Source Code (⭐285)) GPL-3.0 C

• Apache Directory Server - Extensible and embeddable directory server, certified LDAPv3 compatible, with Kerberos 5 and Change Password Protocol support, triggers, stored procedures, queues and views. (Source Code (⭐182)) Apache-2.0 Java

• FreeIPA - Integrated security information management solution combining Linux (Fedora), 389 Directory Server, Kerberos, NTP, DNS, and Dogtag Certificate System (web interface and command-line administration tools). (Source Code) GPL-3.0 Python/C/JavaScript

• FreeRADIUS - Multi-protocol policy server (radiusd) that implements RADIUS, DHCP, BFD, and ARP and associated client/PAM library/Apache module. (Source Code (⭐2.5k)) GPL-2.0 C

• OpenLDAP - Open-source implementation of the Lightweight Directory Access Protocol (server, libraries and clients). (Source Code) OLDAP-2.8 C

Software / VPN

• Dockovpn - Out-of-the-box stateless dockerized OpenVPN server which starts in less than 2 seconds. (Source Code (⭐1.4k)) GPL-2.0 Docker

Software / Backups

• Dar - Which stands for Disk ARchive, is a robust and rich featured archiving and backup software of the tar style. (Source Code (⭐195)) GPL-2.0 C++

Software / Identity Management - Single Sign-On (SSO)

• Authelia - The Single Sign-On Multi-Factor portal for web apps. (Source Code (⭐28k)) Apache-2.0 Go

Software / Monitoring & Status Pages

• Status (⭐306) - Simple and lightweight system monitoring tool for small homeservers with a pleasant web interface. (Demo) MIT Python

Software / Software Containers

• Podman - Daemonless container engine for developing, managing, and running OCI Containers on your Linux System. Containers can either be run as root or in rootless mode. Simply put: alias docker=podman. (Source Code (⭐32k)) Apache-2.0 Go

• systemd-nspawn - Lightweight, chroot-like, environment to run an OS or command directly under systemd. (Source Code (⭐16k)) GPL-2.0 C

Software / Network Configuration Management

• OpenWISP - Open Source Network Management System for OpenWRT based routers and access points. (Demo, Source Code) GPL-3.0 Python

Software / Mail Clients

• Thunderbird - Free email application that's easy to set up and customize. (Source Code) MPL-2.0 C/C++

Software / Monitoring & Status Pages

• Alerta - Distributed, scalable and flexible monitoring system. (Source Code (⭐2.5k)) Apache-2.0 Python

• Healthchecks - Monitoring for cron jobs, background services and scheduled tasks. (Source Code (⭐10k)) BSD-3-Clause Python

• Sensu - Monitoring tool for ephemeral infrastructure and distributed applications. (Source Code (⭐1.1k)) MIT Go

Software / Continuous Integration & Continuous Deployment

• Woodpecker - Community fork of Drone that uses Docker containers. (Source Code (⭐7.1k)) Apache-2.0 Go

Software / Router

• DD-WRT - A Linux-based firmware for wireless routers and access points, originally designed for the Linksys WRT54G series. (Source Code) GPL-2.0 C

• OpenWrt - A Linux-based router featuring Mesh networking, IPS via snort and AQM among many other features. (Source Code) GPL-2.0 C

• OPNsense - An open source FreeBSD-based firewall and router with traffic shaping, load balancing, and virtual private network capabilities. (Source Code) BSD-2-Clause C/PHP

Software / Software Containers

• Docker Compose - Define and run multi-container Docker applications. (Source Code (⭐37k)) Apache-2.0 Go

• Docker Swarm - Manage cluster of Docker Engines. (Source Code (⭐3.6k)) Apache-2.0 Go

Software / Identity Management - Single Sign-On (SSO)

• KeyCloak - Open Source Identity and Access Management. (Source Code (⭐35k)) Apache-2.0 Java

Software / Editors

• Atom Community (⭐780) - A fork of atom (⭐61k) A hackable text editor from Github. MIT JavaScript

Software / Packaging

• aptly - Swiss army knife for Debian repository management. (Source Code (⭐2.8k)) MIT Go

Software / Monitoring & Status Pages

• checkmk - Comprehensive solution for monitoring of applications, servers, and networks. (Source Code (⭐2.3k)) GPL-2.0 Python/PHP

Software / IT Asset Management

• OCS Inventory NG - Asset management and deployment solution for all devices in your IT Department. (Source Code) GPL-2.0 PHP/Perl

• Ralph - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks. (Demo (⭐2.5k), Source Code (⭐2.5k)) Apache-2.0 Python/Docker

• Snipe IT - Asset & license management software. (Source Code (⭐14k)) AGPL-3.0 PHP

Software / Monitoring & Status Pages

• Scrutiny (⭐7.8k) - Web UI for hard drive S.M.A.R.T monitoring, historical trends & real-world failure thresholds. MIT Go

Software / VPN

• Headscale (⭐40k) - Self-hostable fork of Tailscale, cross-platform clients, simple to use, built-in (currently experimental) monitoring tools. BSD-3-Clause Go

Software / Monitoring & Status Pages

• Icinga - Nagios fork that has since lapped nagios several times. Comes with the possibility of clustered monitoring. (Source Code (⭐2.2k)) GPL-2.0 C++

Software / Log Management

• Loki - Log aggregation system designed to store and query logs from all your applications and infrastructure. (Source Code (⭐28k)) AGPL-3.0 Go

Software / Backups

• Backupninja - Lightweight, extensible meta-backup system, provides a centralized way to configure and coordinate many different backup utilities. GPL-2.0 Shell

Software / Continuous Integration & Continuous Deployment

• CDS - Enterprise-Grade Continuous Delivery & DevOps Automation Open Source Platform. (Source Code (⭐4.8k)) BSD-3-Clause Go

Software / Distributed Filesystems

• Perkeep - A set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data (previously Camlistore). (Source Code (⭐7.1k)) Apache-2.0 C

Software / Continuous Integration & Continuous Deployment

• werf - Open Source CI/CD tool for building Docker images and deploying to Kubernetes via GitOps. (Source Code (⭐4.7k)) Apache-2.0 Go

Software / VPN

• Nebula (⭐17k) - A scalable p2p VPN with a focus on performance, simplicity and security. MIT Go

Software / Diagramming

• Diagrams.net - A.K.A. Draw.io. Easy to use Diagram UI with a plethora of templates. (Source Code (⭐5.5k)) Apache-2.0 JavaScript/Docker

Software / Diagramming

• Mermaid - Javascript module with a unique, easy, shorthand syntax. Integrates into several other tools like Grafana. (Source Code (⭐6.6k)) MIT Nodejs/Docker

Software / VPN

• WireGuard - Very fast VPN based on elliptic curve and public key crypto. (Source Code) GPL-2.0 C

Software / Continuous Integration & Continuous Deployment

• Concourse - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. (Demo, Source Code (⭐7.8k)) Apache-2.0 Go

Software / IT Asset Management

• GLPI - Information Resource-Manager with an additional Administration Interface. (Source Code (⭐6k)) GPL-3.0 PHP

Software / Build and software organization tools

• Spack - A flexible package manager that supports multiple versions, configurations, platforms, and compilers. (Source Code (⭐5k)) MIT/Apache-2.0 Python

Software / Identity Management - Tools and web interfaces

• Smallstep Certificates - A private certificate authority (X.509 & SSH) and related tools for secure automated certificate management. (Source Code (⭐8.5k)) Apache-2.0 Go

Software / Identity Management - Tools and web interfaces

• easy-rsa (⭐4.4k) - Bash script to build and manage a PKI CA. GPL-2.0 Shell

External links / Repositories

• deb.sury.org - Repository with LAMP updated packages for Debian and Ubuntu.

Software / Identity Management - Tools and web interfaces

• Pomerium - An identity and context aware access-proxy inspired by BeyondCorp. (Source Code (⭐4.8k)) Apache-2.0 Docker/Go

Software / Continuous Integration & Continuous Deployment

• Jenkins - Continuous Integration Server. (Source Code (⭐25k)) MIT Java

• PHP Censor (⭐686) - Open source self-hosted continuous integration server for PHP projects. BSD-2-Clause PHP

Software / Monitoring & Status Pages

• NetXMS - Open Source network and infrastructure monitoring and management. (Source Code (⭐364)) LGPL-3.0/GPL-3.0 Java/C++/C

Software / DNS - Servers

• CoreDNS - Flexible DNS server. (Source Code (⭐14k)) Apache-2.0 Go

Software / Backups

• Restic - Easy, fast, verifiable, secure and efficient remote backup tool. (Source Code (⭐34k)) BSD-2-Clause Go

Software / VPN

• sshuttle (⭐13k) - Poor man's VPN. LGPL-2.1 Python

Software / Backups

• rclone - Command-line program to sync files and directories to and from different cloud storage providers.. (Source Code (⭐58k)) MIT Go

Software / Editors

• Micro - A modern and intuitive terminal-based text editor. (Source Code (⭐29k)) MIT Go

Software / Automation

• Apache Ant - Automation build tool, similar to make, a library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. (Source Code (⭐462)) Apache-2.0 Java

Software / ChatOps

• Hubot - A customizable, life embetterment robot. (Source Code (⭐17k)) MIT Nodejs

Software / Configuration Management

• CFEngine - Configuration management system for automated configuration and maintenance of large-scale computer systems. (Source Code (⭐524)) GPL-3.0 C

Software / Control Panels

• Froxlor - Lightweight server management software with Nginx and PHP-FPM support. (Source Code (⭐1.7k)) GPL-2.0 PHP

Software / Deployment Automation

• munki - Webserver-based repository of packages and package metadata, that allows macOS administrators to manage software installs. (Source Code (⭐3.4k)) Apache-2.0 Python

Software / Distributed Filesystems

• TahoeLAFS - Secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system. (Source Code (⭐1.4k)) GPL-2.0 Python

Software / DNS - Control Panels & Domain Management

• Designate - DNSaaS services for OpenStack. (Source Code) Apache-2.0 Python

• DomainMOD - Manage your domains and other internet assets in a central location. (Source Code (⭐588)) GPL-3.0 PHP

Software / DNS - Servers

• Knot - High performance authoritative-only DNS server. (Source Code) GPL-3.0 C

Software / Editors

• Haroopad - Markdown editor with live preview. (Source Code (⭐1.7k)) GPL-3.0 JavaScript

• KDevelop - IDE by the people behind KDE. (Source Code) GFDL-1.2 C++

• Notepad++ - GPLv2 multi-language editor with syntax highlighting for Windows. (Source Code (⭐28k)) GPL-2.0 C++

Software / Identity Management - Tools and web interfaces

• BounCA - A personal SSL Key / Certificate Authority web-based tool for creating self-signed certificates. (Source Code) Apache-2.0 Python

• Fusion Directory - Improve the Management of the services and the company directory based on OpenLDAP. (Source Code (⭐187)) GPL-2.0 PHP

• LDAP Account Manager (LAM) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. (Source Code (⭐481)) GPL-3.0 PHP

• Libravatar - Libravatar is a service which delivers your avatar (profile picture) to other websites. (Source Code) AGPL-3.0 Python

• Samba - Active Directory and CIFS protocol implementation. (Source Code) GPL-3.0 C

Software / Log Management

• Flume - Distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log data. (Source Code (⭐2.6k)) Apache-2.0 Java

Software / Mail Clients

• Claws Mail - Old school email client (and news reader), based on GTK+. (Source Code) GPL-3.0 C

• ImapSync - Simple IMAP migration tool for copying mailboxes to other servers. (Source Code (⭐4k)) NLPL Perl

• Mutt - Small but very powerful text-based mail client. (Source Code) GPL-2.0 C

Software / Miscellaneous

• Chocolatey - The package manager for Windows. (Source Code (⭐11k)) Apache-2.0 C#/PowerShell

• Fog - Cloning/imaging solution/rescue suite. (Source Code (⭐1.6k)) GPL-3.0 PHP/Shell

Software / Monitoring & Status Pages

• Adagios - Web based Nagios interface for configuration and monitoring (replacement to the standard interface), and a REST interface. (Source Code (⭐333)) AGPL-3.0 Docker/Python

• cadvisor (⭐19k) - Analyzes resource usage and performance characteristics of running containers. Apache-2.0 Go

• Nagios - Computer system, network and infrastructure monitoring software application. (Source Code (⭐2k)) GPL-2.0 C

• Performance Co-Pilot - Lightweight, distributed system performance and analysis framework. (Source Code (⭐1.1k)) LGPL-2.1/GPL-2.0 C

• PHP Server Monitor - Open source tool to monitor your servers and websites. (Source Code (⭐2.2k)) GPL-3.0 PHP

• PhpSysInfo - A customizable PHP script that displays information about your system nicely. (Source Code (⭐1.4k)) GPL-2.0 PHP

• rtop (⭐2.2k) - Interactive, remote system monitoring tool based on SSH. MIT Go

Software / Network Configuration Management

• GNS3 - Graphical network simulator that provides a variety of virtual appliances. (Source Code (⭐2.6k)) GPL-3.0 Python

• Oxidized (⭐3.4k) - Network device configuration backup tool. Apache-2.0 Ruby

Software / Packaging

• omnibus-ruby (⭐1.3k) - Easily create full-stack installers for your project across a variety of platforms. Apache-2.0 Ruby

Software / Queuing

• ActiveMQ - Java message broker. (Source Code (⭐2.4k)) Apache-2.0 Java

• Gearman - Fast multi-language queuing/job processing platform. (Source Code (⭐759)) BSD-3-Clause C++

Software / Service Discovery

• Consul - Consul is a tool for service discovery, monitoring and configuration. (Source Code (⭐30k)) MPL-2.0 Go

Software / Software Containers

• LXC - Userspace interface for the Linux kernel containment features. (Source Code (⭐5.2k)) GPL-2.0 C

Software / Troubleshooting

• grml - Bootable Debian Live CD with powerful CLI tools. (Source Code) GPL-3.0 Shell

• mtr - Network utility that combines traceroute and ping. (Source Code (⭐3.3k)) GPL-2.0 C

• Wireshark - The world's foremost network protocol analyzer. (Source Code) GPL-2.0 C

Software / Version control

• Mercurial - Distributed source control management tool. (Source Code) GPL-2.0 Python/C/Rust

Software / Virtualization

• Packer - A tool for creating identical machine images for multiple platforms from a single source configuration. (Source Code (⭐16k)) MPL-2.0 Go

• Proxmox VE - Virtualization management solution. (Source Code) GPL-2.0 Perl/Shell

• Vagrant - Tool for building complete development environments. (Source Code (⭐27k)) BUSL-1.1 Ruby

• VirtualBox - Virtualization product from Oracle Corporation. (Source Code) GPL-3.0/CDDL-1.0 C++

Software / VPN

• OpenVPN - Uses a custom security protocol that utilizes SSL/TLS for key exchange. (Source Code (⭐14k)) GPL-2.0 C

• SoftEther - Multi-protocol software VPN with advanced features. (Source Code (⭐13k)) Apache-2.0 C

• strongSwan - Complete IPsec implementation for Linux. (Source Code (⭐2.9k)) GPL-2.0 C

External links / Communities / Forums

• Reddit - Really, really large bulletin board system.
  • /r/Linux - News and information about Linux.
  • /r/LinuxQuestions
  • /r/SysAdmin

• Spiceworks Community - General enterprise IT news and small articles.

• StackExchange Network - Q&A communities.
  • Server Fault - StackExchange community for system and network administrators.

External links / Repositories

• EPEL - Repository for RHEL and compatibles (CentOS, Scientific Linux).

• IUS - Community project that provides RPM packages for newer versions of select software for Enterprise Linux distributions.

• Remi - Repository with LAMP updated packages for RHEL/Centos/Fedora.

• Software Collections - Community Release of Red Hat Software Collections. Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.

External links / Websites

• ArchWiki - Arch Linux Wiki which has really nice written articles valid for other distros.

• Gentoo Wiki - Gentoo Linux Wiki with a lot in-detail description of Linux components.

• Awesome SysAdmin @ LibHunt - Your go-to SysAdmin Toolbox. Based on the list here.

• Digital Ocean Tutorials - 6,000+ tutorials for getting the basics of certain applications/tools/systems administration topics.