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

Integrate systems. Automate work. Accelerate your digital transformation with a single platform for integration and business process automation.

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol.

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

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.