Test, scrape, generate, and automate without the pain and expense of hosting your own headless browsers.

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

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.

Mockoon is the easiest and quickest way to design and run mock REST APIs.

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