Postman - The Collaboration Platform for API Development
X Steps Recorder - A clone of Microsoft's Problem Steps Recorder, but for linux.
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Folge - The fastest tool for creating step-by-step guides.
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.
Snagit - Screen Capture Software for Windows and Mac