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.

Professional software tool for HTTP testing and debugging

Appium is an open-source project and ecosystem of related software, designed to facilitate UI automation of many app platforms

Use Espresso to write concise, beautiful, and reliable Android UI tests.

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

Fast, easy and reliable testing for anything that runs in a browser, Cypress is the new standard in front-end testing that every developer and QA engineer needs.