Epic Pen - A windows tool for drawing over your desktop and applications
Streamlabs Chatbot - Streamlabs Chatbot is a chat bot for Twitch, YouTube Gaming, and Mixer.
Gromit-MPX - Create annotations by directly drawing on your screen.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
StreamElements - An all-in-one toolkit to help streamers grow 📹
gInk - An on-screen on-screen annotation software for Windows.