Fake is a new browser for Mac OS X that makes web automation simple.

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

REST API client library for .NET

Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.

API Testing Platform that automatically generates unit test cases with dependency mocks from API calls

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