SikuliX version 2.0.0+ (2019+)
Programmer-friendly testing framework for Java and the JVM
The OWASP ZAP core project
Flexible, lightweight multi-language test reporting tool
SoapUI is a free and open source cross-platform functional testing
Test automation made simple
Most popular Mocking framework for unit tests written in Java
Testing Kotlin and Java annotation processors, compiler plugins
Coverage-guided, in-process fuzzing for the JVM
The Open Source Test Automation Platform
Gateway service providing dynamic routing, monitoring and more
Python version of the Playwright testing and automation library
Desktop app that helps you craft Gatling load-testing simulations
State of the art mutation testing system for the JVM
Optimizer for mobile applications
API automation and load testing framework
Lightweight service virtualization/ API simulation / API mocking tool
Property-based testing for Scala
Cucumber for Ruby
Android unit testing framework
.NET version of the Playwright testing and automation library
Powerful, elegant and flexible test framework for Kotlin
Modern concurrency tools including agents, futures, promises, etc.
Java GUI-Less browser, supporting JavaScript, to run against web pages
Database Subsetter and Relational Data Browser