Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

Render your Android screens without a physical device or emulator.

Robot Framework is a generic open source automation framework. It can be used for test automation and robotic process automation (RPA).

Simple animated GIF screen recorder with an easy to use interface.

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.

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