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

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.

Charles is a HTTP proxy that enables you to see traffic between your machine and the backend

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

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

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.