OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Epic Pen - A windows tool for drawing over your desktop and applications
Streamlabs - All-in-one live streaming software
Gromit-MPX - Create annotations by directly drawing on your screen.
Lightstream - Powerful, cloud-based live streaming studio.
Gamecaster - Gamecaster is a graphical user interface for open source framework 'glc'.