Postman - The Collaboration Platform for API Development
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Mocky.io - Mock your HTTP responses to test your REST API
Hoppscotch - Open source API development ecosystem
StopLight - Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience.
Paw.cloud - Paw is a REST client for Mac.