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.

End-to-End Testing & Debugging powered by OpenTelemetry

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

Don’t just observe. Take action. The only app monitoring platform built for developers that gets to the root cause for every issue.

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

Burp or Burp Suite is a set of tools used for penetration testing of web applications. It is developed by a company named Portswigger who make freely available a Web Security Academy which has a range of lessons on penetration testing.