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

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

A browser extension and Ruby gem to improve the debugging experience when testing Rails applications

Fully integrated API and web service testing capabilities that automate end-to-end functional API testing.

Sonic is a platform that integrates remote control debugging and automated testing of mobile devices, and strives to create a better user experience for global developers and test engineers.