Programmer-friendly testing framework for Java and the JVM
HTTP load testing tool and library. It's over 9000!
Now continued as OculiX — see oculix.org
The OWASP ZAP core project
Lightweight service virtualization/ API simulation / API mocking tool
SoapUI is a free and open source cross-platform functional testing
Flexible, lightweight multi-language test reporting tool
API automation and load testing framework
Most popular Mocking framework for unit tests written in Java
Test automation made simple
Coverage-guided, in-process fuzzing for the JVM
Optimizer for mobile applications
SoloPi Automated Testing Tool
State of the art mutation testing system for the JVM
Python version of the Playwright testing and automation library
Desktop app that helps you craft Gatling load-testing simulations
Gateway service providing dynamic routing, monitoring and more
The Open Source Test Automation Platform
Android unit testing framework
Property-based testing for Scala
.NET version of the Playwright testing and automation library
Powerful, elegant and flexible test framework for Kotlin
Cucumber for Ruby
Modern concurrency tools including agents, futures, promises, etc.
Java GUI-Less browser, supporting JavaScript, to run against web pages