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.

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

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

Sonic is a platform that integrates remote control debugging and automated testing of mobile devices, and strives to create a better user experience for global developers and test engineers.

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