OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
MSI Afterburner - Tool to manage video cards. Shows video card stats (temp, GPU usage, etc.).
Snagit - Screen Capture Software for Windows and Mac
ASUS GPU Tweak - ASUS GPU Tweak fully implements TechPowerUp’s GPU-Z analysis and monitoring features.
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Guru3D - Guru of 3D: PC Hardware Reviews and tests