Robot Framework is a generic open source automation framework. It can be used for test automation and robotic process automation (RPA).

YATTIE exists to help make tester's lives easier. Ideally, it should remove friction from the exploratory testing process - everywhere from gathering evidence to submitting reports.

Mockoon is the easiest and quickest way to design and run mock REST APIs.

Browser and Mobile Automation Test Framework for Node.js

Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.