Selenium automates browsers. That's it! What you do with that power is entirely up to you.

REST API client library for .NET

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

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.

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