Simulate APIs, integrations, and environments at enterprise scale.

Selenium automates browsers. That's it! What you do with that power is entirely up to you.

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

Swagger UI allows anyone — be it your development team or your end consumers — to visualize and interact with the API’s resources without having any of the implementation logic in place

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

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.