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

A screenshot/screenvideo tool! Also allows you to do basic alterations to the screenshots (arrows, blur, ...)

Use Espresso to write concise, beautiful, and reliable Android UI tests.

Achieve effortless quality with zero coding, zero maintenance, and the autonomous power of the world's first open-source testing agent.

Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).

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.