HTTP load testing tool and library. It's over 9000!
Programmer-friendly testing framework for Java and the JVM
Now continued as OculiX — see oculix.org
The OWASP ZAP core project
SoapUI is a free and open source cross-platform functional testing
Flexible, lightweight multi-language test reporting tool
Test automation made simple
Most popular Mocking framework for unit tests written in Java
API automation and load testing framework
Gateway service providing dynamic routing, monitoring and more
SoloPi Automated Testing Tool
State of the art mutation testing system for the JVM
.NET version of the Playwright testing and automation library
Python version of the Playwright testing and automation library
Desktop app that helps you craft Gatling load-testing simulations
Cucumber for Ruby
Powerful, elegant and flexible test framework for Kotlin
Lightweight service virtualization/ API simulation / API mocking tool
The Open Source Test Automation Platform
Property-based testing for Scala
Java GUI-Less browser, supporting JavaScript, to run against web pages
Enterprise integration testing framework
Database Subsetter and Relational Data Browser
Editor for Fixed Width, Csv and Existing Xml files.
The Interactive Exernal Accessor Tool for develop, test and support.