GetStream.io - APIs for the development of scalable newsfeeds and chat applications.

Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

Geneva - An all-in-one communication app for groups & communities

ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...

müteme - A free Zoom mute button for Mac

FastStone Capture - A powerful, lightweight, yet full-featured screen capture tool that allows you to easily capture...