BoxCast - BoxCast is a complete, easy-to-use live streaming solution for organizations.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.