Streamline your API testing, integration testing and test data management.

Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

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

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.

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