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

Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

Free & OpenSource REST API Testing Tool for all levels in a Test Pyramid

Best "simple" screen capturing app (Mac and Windows) because it creates animated gifs that attach to bugs easily. Simple because it works a lot like snippy to capture screen areas

Robotium is an Android test automation framework that has full support for native and hybrid applications.

Hoppscotch is an open-source API development ecosystem that helps you create and test your API requests saving precious time in development.