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.

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

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

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

It’s a disposable email platform made for QA and test automation. You get private, isolated inboxes that behave like real ones — but are built for fast, repeatable, testable flows.

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