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

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.

Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).

Free & OpenSource REST API Testing Tool for all levels in a Test Pyramid

Automate API workflows. Chain HTTP requests. Validate. Zero code.

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.