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.

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

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

Real API Design-first Development Platform Design. Debug. Test. Document. Mock. Build APIs Faster & Together.

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.

Website and mobile testing at every stage of development