Postman - The Collaboration Platform for API Development
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
RESTer - A REST client for almost any web service (Firefox and Chrome extension).
LightShot - The fastest way to take a customizable screenshot.