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

Browser and Mobile Automation Test Framework for Node.js

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.

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

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

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