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.

Swagger UI allows anyone — be it your development team or your end consumers — to visualize and interact with the API’s resources without having any of the implementation logic in place

Fully integrated API and web service testing capabilities that automate end-to-end functional API testing.

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

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

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