Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

An open-source, automated tool to help you improve the quality of web pages. You can run it on any web page, public or requiring authentication.

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.

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

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

The WAVE Chrome, Firefox, and Edge extensions allows you to evaluate web content for accessibility issues directly within your browser.