Design, debug, and test APIs locally or in the cloud

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

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

Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

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

SeleniumBase Case Plans is Test Case Management Software that uses Markdown tables for displaying test plans directly in GitHub (and other source code management systems that support Markdown format).