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

Robot Framework is a generic open source automation framework. It can be used for test automation and robotic process automation (RPA).

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

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).

k6 Open Source is designed for load testing. Extensible to support other types of testing.

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