JunoRestClient - JunoRestClient helps you to create, organize and test your REST API quickly.
Postman - The Collaboration Platform for API Development
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Postman Workspaces - Organize and speed up API development work
soapUI - SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.
apptalk.ninja - App and device communication diagnostics tool for better bug tracking & QA.