Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.
Free Cam - Easy screen recorder for Windows. A complete set of functions for creating, editing and instantly sharing high-quality screencasts. 100% free for life!
Guru3D - Guru of 3D: PC Hardware Reviews and tests
TinyTake - Free 5 minutes recording and 2GB space and no youtube uploads, $29.95/year premium.
Geforce Experience - GeForce Experience is a new application from NVIDIA that optimizes your PC in two key ways.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.