Software / UI & End-to-End Testing

• DevAssure - Agentic testing for E2E web UI on real browsers. Agent can be added to Github Actions to test only the flows that have changed in a PR.

Software / API Testing

• postman2pytest (⭐16) - Convert a Postman Collection v2.1 JSON file into a ready-to-run pytest test suite.

Software / Service Virtualization

• MockServer (⭐4.9k) - Mocking, debugging proxy and chaos engineering tool for multiple protocols (HTTP, gRPC, GraphQL, LLM, MCP, Kafka, TCP and more); mock any dependency, record/replay and inspect traffic, verify requests, and inject faults. Docker, JAR, Helm, multi-language clients.

Software / UI & End-to-End Testing

• tapflow (⭐157) - Self-hosted mobile QA tool that streams iOS simulators and Android emulators to the browser for team-wide testing without local setup.

Software / UI & End-to-End Testing

• agent-qa (⭐152) - Open-source Agentic QA Harness with Memory. Write tests in natural language. agent-qa runs them across web and mobile with execution memory, catching regressions before release.

Software / Test Automation Frameworks

• Jumpstarter (⭐194) - Open source hardware-in-the-loop testing framework for automated testing on real and virtual hardware with CI/CD integration.

Software / API Testing

• Bruno (⭐46k) - Open-source API client for exploring and testing APIs.

Training (Includes developer training for automation testers) / A/B Testing

• FrontRow (⭐5) - Open source React Native mobile app built as a hands on training surface for QA automation. Cross platform testIDs work across Maestro, Appium, Espresso and XCUITest, and a deep QA Debug Menu lets trainees force the failure modes that actually bite in production (4xx, 5xx, timeouts, offline, denied permissions, declined IAP, expired tokens) without flaky backends.

Software / API Testing

• KushoAI - AI-native platform for API contract testing, end-to-end testing, UI testing, and continuous security scanning, with self-healing tests that automatically adapt to code changes in CI/CD.

Software / AI & LLM Testing

• Evaliphy (⭐18) - Test your AI system end-to-end with Evaliphy. It uses a Playwright-style testing approach and generates HTML reports.

Software / Visual Testing

• Lastest - Visual regression testing for Playwright with AI flake triage and baseline review.

Software / AI & LLM Testing

• AgentSkeptic (⭐0) - Verifies AI/agent workflows by checking database state after execution, comparing expected vs observed outcomes with read-only SQL.

Software / Service Virtualization

• fakecloud (⭐464) - Free, open-source local AWS cloud emulator for integration tests, with 23 services at 100% conformance and first-party test-assertion SDKs in 6 languages.

Software / Accessibility & Usability Testing

• VertaaUX CLI (⭐0) - UX, accessibility, and conversion audits from the terminal and CI, with score-based quality gates and PR regression detection.

Software / AI & LLM Testing

• Tenro (⭐6) - Open-source testing framework for AI agents. Simulate LLM and tool calls to test edge cases, failure paths, and agent logic without live API calls.

Software / Test Data Management

• MockHero - REST API for generating synthetic test data. 156 field types, 22 locales, relational data, sub-50ms. Free tier available.

Software / A/B Testing

• Kirro - A/B testing tool with visual editor, Bayesian statistics, and GA4 conversion tracking.

Software / API Testing

• API Status Check - Real-time status monitoring dashboard for 188+ third-party APIs (OpenAI, Stripe, AWS, GitHub, etc.) with response time tracking and free alert tiers.

Software / UI & End-to-End Testing

• Polarity - Full visual and desktop environments showcasing complete E2E testsing for all UI/UX features. Generated you Playwrite, Cypress, and other code for you as the test runs.

Software / Service Virtualization

• ApiNotes - Drop your OpenAPI spec and get a fully functional mock API server instantly. Export to Bruno API client or test directly.

Software / Test Management

• skipper (⭐2) - Real-time test execution control via Google Spreadsheet, enabling instant toggle without code changes.

Software / Test Automation Frameworks

• ai-natural-language-tests (⭐22) - Generates Cypress and Playwright E2E tests from natural language requirements using LangGraph, ChromaDB, and multi-provider LLM support.

• OpenTester (⭐26) - MCP-First Testing Framwork: AI Agents Can Now Test Like Humans

Software / Visual Testing

• Frostbyte Screenshot Action (⭐0) - GitHub Action for automated website screenshots in CI/CD pipelines. Supports multiple viewports, full-page capture, and dark mode emulation.

Software / Browser Extensions & Utilities

• Anchor Browser - Cloud browser infrastructure with built-in stealth and proxy rotation for automated testing at scale

Software / API Testing

• Spiderhash - Webhook debugging and request inspection tool for testing callback payloads, headers, and delivery behavior.

Software / Service Virtualization

• mockd (⭐132) - Open-source multi-protocol mock server supporting HTTP, gRPC, GraphQL, WebSocket, MQTT, and SOAP with chaos engineering and proxy recording.

Software / Accessibility & Usability Testing

• RatedWithAI - AI-powered website accessibility scanner that checks for ADA and WCAG 2.2 compliance with instant actionable audits.

• WAVE - Suite of evaluation tools that helps authors make their web content more accessible to individuals with disabilities.

Blogs / A/B Testing

• And others (⭐113)

Software / API Testing

• Webhook Debugger (⭐12) - Open-source, self-hosted webhook inspector with signature verification support.

Software / Visual Testing

• Sherlo (⭐81) - Visual testing platform for React Native Storybook. Captures screenshots on iOS and Android simulators in the cloud and detects visual changes automatically.

Suggested Awesome Lists / Useful References

• Awesome Performance Engineering (⭐29) - A curated collection of tools and resources for performance engineering, covering observability and performance testing.

Software / AI & LLM Testing

• voicetest (⭐26) - Open-source test harness for voice AI agents supporting Retell, VAPI, LiveKit, and Bland with autonomous simulations and LLM-based evaluation.

Software / Visual Testing

• SmartUI by TestMu AI (formerly LambdaTest)- AI-Native Visual Testing Tool for Flawless UIs across browsers, apps, websites, and PDFs.

Software / UI & End-to-End Testing

• flutter-skill (⭐325) - AI-powered E2E testing via MCP for Flutter, React Native, iOS, Android, Electron, Tauri, KMP, and .NET MAUI. Zero test code.

• TestMu AI (formerly LambdaTest) - Full-Stack Agentic AI Quality Engineering platform that empowers teams to test intelligently and ship faster.

Newsletters / A/B Testing

• Coding Jag - Your weekly dose of the latest in AI, Testing, Development, CI/CD, and Automation—keeping you ahead of the curve.

Software / API Testing

• Webhook Debugger & Logger - Enterprise-grade tool for testing, debugging, and logging incoming webhooks in real-time.

Software / Security Testing

• BurpSuite - Intercept API and Reply with changes in realtime with according api manipulations.

• Nuclei Scanner (⭐30k) - nuclie is automated scanner for common vulnerbilty finding on site.

Software / AI & LLM Testing

• promptfoo (⭐23k) - Open-source framework for testing and red teaming LLM applications. Compare prompts, test RAG architectures, run multi-turn adversarial attacks, and catch security vulnerabilities with CI/CD integration.

Software / UI & End-to-End Testing

• DeviceLab - Private device lab infrastructure for mobile testing. Connect your own iOS/Android devices and run Appium, Maestro, or XCUITest remotely via WebRTC. Zero-trust architecture keeps test data on your network.

Software / UI & End-to-End Testing

• Keploy – Open-source AI-powered end-to-end testing tool for APIs and microservices that auto-generates test cases and mocks from real traffic.

Software / API Testing

• BitDive - Zero-code API testing platform for Java/Kotlin. Captures deep runtime context (HTTP, SQL, methods), auto-generates mocks from real traffic, and enables Live Context Replay for E2E testing and debugging.

Software / UI & End-to-End Testing

• Mocky Balboa - Mock server side network requests in your fullstack apps declaratively at runtime

Software / API Testing

• SpecTest (⭐23) - Truly declarative API testing framework in Js, or plain JSON.

Software / Visual Testing

• Happo - Cross-browser screenshot and visual regression testing service, integrates with tools like Storybook, Playwright, and Cypress.

Software / API Testing

• Tests Coverage Tool (⭐10) - Ultimate tool to measure gRPC service coverage from tests.

• Swagger Coverage Tool (⭐25) - The Swagger Coverage Tool is designed to measure API test coverage based on Swagger documentation. It provides automated tracking and reporting of test coverage for APIs, helping ensure that your endpoints and services are well-tested.

Software / UI & End-to-End Testing

• UI Coverage Tool (⭐8) - UI Coverage Tool is an innovative, no-overhead solution for tracking and visualizing UI test coverage — directly on your actual application, not static snapshots.

Software / Performance & Load Testing

• Load Testing Hub Panel (⭐23) - Ultimate web UI for visualizing load test results

Software / API Testing

• CORS Tester - A tool for developers and API testers to check if an API is CORS-enabled for a given domain and identify gaps.

Software / Service Virtualization

• Beeceptor - Easy to use no-code mock servers for service virtualization. Rest, SOAP, GraphQL supported. Create an API mock server from OpenAPI Specification or Postman collection.

• WireMock (⭐7.3k) - Open source HTTP mock engine written in Java. Embed in your test code, run as a standalone process, or deploy via Docker.

Software / UI & End-to-End Testing

• Hyperbrowser - Scalable headless browser testing with built-in session recording.

• Hercules (⭐1.1k) - Open-source end-to-end testing agent.

Software / Visual Testing

• TestingBot - Supports automated, manual, and visual testing.

Software / API Testing

• HttpMaster - Professional software tool for HTTP testing and debugging.

Software / Visual Testing

• GoodLooks (⭐52) - AI-powered visual validation for Playwright tests.

Software / UI & End-to-End Testing

• playwright-bdd (⭐722) - BDD-style Playwright testing.

Software / UI & End-to-End Testing

• Ferrum (⭐2k) - Chrome automation via CDP with a high-level Ruby API.

Software / Test Management

• Testomatio - Modern TCMS allowing sync of manual and automated tests.

Software / UI & End-to-End Testing

• Octomind - AI-powered test case discovery and maintenance.

Software / Web3 & Blockchain Testing

• Cannon - Continuous configuration automation for Ethereum.

Software / Visual Testing

• wopee.io - Autonomous visual regression testing platform.

Software / Web3 & Blockchain Testing

• Dapp.tools - Command-line tools and smart contract libraries for Ethereum.

• Ganache - Personal Ethereum blockchain for running tests.

• Foundry (⭐10k) - Fast, modular toolkit for Ethereum development.

• Hardhat - Ethereum development and testing environment.

• Truffle Suite - Comprehensive smart contract development suite.

• Robot Framework Solidity Testing Toolkit (⭐13) - Robot Framework integration for Solidity testing.

Software / Test Automation Frameworks

• Robot Framework - Generic open-source automation framework for testing and RPA.

Software / API Testing

• RestQA (⭐93) - REST API testing framework based on Gherkin.

Training (Includes developer training for automation testers) / A/B Testing

• BBST Testing Courses - The famous Black Box Software Testing (BBST) courses are university level courses on Software Test Foundations, Bug Reporting and Test Design. These materials have been creative commons licensed for use by anyone. Includes articles, slides and video lectures.

Software / Test Data Management

• test-each (⭐119) - Data-driven testing framework.

Software / Test Data Management

• Touca (⭐511) - Continuous regression testing for behavioral and performance comparisons.

Software / UI & End-to-End Testing

• BugBug - No-code test automation tool for web applications.

Software / API Testing

• Keploy (⭐18k) - API Testing Platform that automatically generates unit test cases along with dependency mocks.

Books / A/B Testing

• Effective Software Testing - A hands-on guide for developers on how to create high quality tests in a systematic and effective way.

Books / A/B Testing

• Chaos Engineering - A book that teaches you to design and execute controlled experiments that uncover hidden problems.

• The Art of Unit Testing, Third Edition - A book that guides you step by step from your first simple unit tests to building complete test sets that are maintainable, readable, and trustworthy.

• Testing Web APIs - Guarantee the quality and consistency of your web APIs by implementing an automated testing process.

Software / Service Virtualization

• DeepfakeHTTP (⭐527) - Web server using HTTP dumps as a response source for API simulation.

Software / Browser Extensions & Utilities

• Requestly - A lightweight proxy to intercept and modify network requests.

Software / Test Data Management

• Synth (⭐1.5k) - Open-source test data generator.

Blogs / A/B Testing

• Automation Panda

QA and Testing Road Map / Useful References

• How to start QA and Testing career (⭐2.1k) - A wide and rich list of strategies, topics, and skills that you need to start a career in software testing and automation.

Newsletters / A/B Testing

• Software Testing Weekly - A curated round-up of the best software testing news and tools published every Friday.

Blogs / A/B Testing

• Softwaretester Blog

Books / A/B Testing

• Testing JavaScript Applications - A book about JavaScript testing tools and techniques for developers.

Books / A/B Testing

• Chaos Engineering: Crash test your applications - A book on how to design and execute controlled software failure experiments.

Suggested Awesome Lists / Useful References

• How They Test (⭐6.8k) - A curated collection of public resources from tech companies on how they test their software and build a quality culture

Software / UI & End-to-End Testing

• QA Wolf (⭐3.4k) - Node.js library for creating browser tests faster.

Software / Test Management

• Kiwi TCMS (⭐1.2k) - Open-source test case management.

Software / Screen Recording & Session Replays

• Captura (⭐11k) - Open-source video recording tool.

Blogs / A/B Testing

• Nikita Sobolev

Suggested Awesome Lists / Useful References

• Awesome JMeter (⭐793) - A curated collection of resources around Apache JMeter.

Software / UI & End-to-End Testing

• Courgette - Declarative BDD UI testing with Gherkin.

Software / Visual Testing

• recheck-web (⭐270) - Change comparison tool with Golden Masters and "unbreakable Selenium" tests.

Software / Browser Extensions & Utilities

• Check All - Provides a "Select All" function where missing.

Suggested Awesome Lists / Useful References

• Awesome Cucumber (⭐45) - A (relatively-newer) curated list of awesome Cucumber and Gherkin-related resources.

Software / Visual Testing

• Fluxguard - Screenshot pixel and DOM change comparisons.

Others / Useful References

• Software Testing Interview Tool (⭐52) - A very buggy To Do List to facilitate face to face interviews.

Software / Test Management

• TestLink (⭐1.6k) - Open-source test case management system.

Books / A/B Testing

• The Scrum Field Guide, Agile advice for your first year and beyond - Why you might want to move your company to Agile and great practical advice on how to do it.

• Fifty quick ideas to improve your Tests - Great illustrative examples on how to improve tests and why you should do them. Great as evidence for winning arguments!

• Agile Testing: A Practical Guide - A how to guide for those looking to transition to an Agile as a tester and also how the authors work on their Agile teams.

• Explore It!: Reduce Risk and Increase Confidence with Exploratory Testing - A very good book on structuring Exploratory Testing and designing tests.

• The Domain Testing Workbook - An in-depth look at the most common test technique, Domain Testing (also called Boundary Analysis and Equivalence Class partitioning) in use today with lots of examples to become better.

• Don't Make Me Think: A Common Sense Approach to Web Usability - An incredibly useful book for usability testing.

• Lessons Learned in Software Testing - One of the best books on Software Testing, broken into bite size lessons that are as applicable now as when it was published.

• UI is Communication - How to make intuitive User Interfaces (UI and Usability Testing).

• Thinking, Fast and Slow - About how we make decisions and how to run experiments (experiments == tests).

Blogs / A/B Testing

• James Bach

• Michael Bolton

• Janet Gregory

Software / Mind Mapping & Documentation

• Xmind - Mind mapping tool for documenting test cases and strategies.

Suggested Awesome Lists / Useful References

• Awesome Software Quality (⭐2.3k) - A list of free software testing and verification resources.

Others / Useful References

• Software Testing Conferences - A list of software testing conferences and workshops.

Suggested Awesome Lists / Useful References

• Learn to Code (⭐4.9k) - Learning to code, for those looking to make the move to automation

Software / Browser Extensions & Utilities

• Bug Magnet - Field-based value suggestions for form testing.

Suggested Awesome Lists / Must Read

• Falsehoods (⭐28k) - A funny and educational list of why nothing in Software Development is ever easy. Think you can store a marriage in a DB?

• Naughty Strings (⭐48k) - This is the famous list of Naughty Strings. If you're doing some field validation, look no further for inspiration.

• Unicode (⭐978) - A great resource for learning how unicode works and the issues it can cause.

Suggested Awesome Lists / Useful References

• The Original (⭐481k) - The awesome list of awesome lists.

• Application Security (⭐7k) - Incredibly extensive, but you'll find something to fit the bill.

• Selenium (⭐1.1k) - Better than searching Google if you know what you want.

• Security (⭐15k) - This is mostly focused on Infrastructure, but if you're testing a series of systems, this is very useful.

Software / Security Testing

• BeEF - Manipulate the browser by exploiting any XSS vulnerabilities you find.

Software / Security Testing

• OWASP ZAP (⭐15k) - Intercepting proxy for HTTP traffic manipulation, security scanning, and exploitation.

Software / Browser Extensions & Utilities

• Full Page Screenshot - Capture full-page screenshots.

• Form Filler - Auto-fill large forms with dummy data.

• ProxySwitcher - Easy proxy switching for test/prod environments.

Software / Accessibility & Usability Testing

• Colour Blindness Simulator - Simulate different types of color blindness.

Software / Performance & Load Testing

• Yslow - Analyze web page performance based on Yahoo!'s rules.

Training (Includes developer training for automation testers) / A/B Testing

• The Dojo - Courses and talks directly from the testing community.

• Coursera - Online courses from top universities.

• Cybrary - Online free security training.

Others / Useful References

• Testers Rage Playlist - A collaborative playlist from testers for when the red mist descends.