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

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

Comprehensive and user-friendly cloud platform for Load Testing, Speed Testing and Website & API Optimization and Monitoring

Anyone on your team can load test with instant playback, an easy-to-use interface, and real browsers for reliable data.

WebLOAD – Performance and Load Testing for the Most Challenging Web Applications

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.