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.

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.

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

Simulate APIs, integrations, and environments at enterprise scale.

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.

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