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.

Simplifying testing workflows for developers and QA engineers with instant, privacy-first mock file generation.

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol.

Website and mobile testing at every stage of development

Mockoon is the easiest and quickest way to design and run mock REST APIs.

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