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

Screenshot testing library for Android.

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

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

Automated robustness testing at the UI level

Unifying API testing, API Performance testing, API Mocks and UI testing.