Requester - HTTP client plugin for Sublime Text with an expansive feature set, modern UX, elegant syntax and...
RESTClient - RESTClient can be used to test variety of HTTP communications and RESTful webservices.
RESTer - A REST client for almost any web service (Firefox and Chrome extension).
Cocoa Rest Client - A free open source, native Apple OS X app for testing HTTP/REST endpoints
Insomnia REST - The most intuitive cross-platform REST API Client ð´
SoapSonar - Crosscheck Networks designed SOAPSonar from the ground-up as a comprehensive testing solution with...