The OWASP ZAP core project
Now continued as OculiX — see oculix.org
Gateway service providing dynamic routing, monitoring and more
SoapUI is a free and open source cross-platform functional testing
Python version of the Playwright testing and automation library
Concurrent browser tests for your Elixir web apps
Beyond the basics of Node.js testing
Fast, easy and reliable testing for anything that runs in a browser
HTTP checks & tests (private & public) monitoring
Headless Chromium-based web performance metrics collector
qooxdoo - Universal JavaScript Framework
Desktop app that helps you craft Gatling load-testing simulations
State of the art mutation testing system for the JVM
Lightweight service virtualization/ API simulation / API mocking tool
Supports tests, providing lightweight, throwaway instances of database
Malicious traffic detection system
.NET version of the Playwright testing and automation library
Optimizer for mobile applications
Visual Regression Testing for Storybook
The Open Source Test Automation Platform
A library for isolated developing UI components
A web application for testing webservices
Java GUI-Less browser, supporting JavaScript, to run against web pages
The Interactive Exernal Accessor Tool for develop, test and support.