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.

Percy is a visual testing and monitoring tool that focuses on detecting visual changes in web applications

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

Don’t just observe. Take action. The only app monitoring platform built for developers that gets to the root cause for every issue.

API Testing Platform that automatically generates unit test cases with dependency mocks from API calls

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.