The world's leading uptime monitoring service.

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.

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

Real API Design-first Development Platform Design. Debug. Test. Document. Mock. Build APIs Faster & Together.

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

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