TechTool Pro - Techtool Pro is a robust hardware diagnostic tool available for Macintosh.
MSI Afterburner - Tool to manage video cards. Shows video card stats (temp, GPU usage, etc.).
DiskWarrior - DiskWarrior, the world's most advanced and highest rated hard disk, hard drive, and disk repair and data recovery tool for macOS, OS X and Mac OS X.
ASUS GPU Tweak - ASUS GPU Tweak fully implements TechPowerUp’s GPU-Z analysis and monitoring features.
DriveDx - DriveDx is advanced drive health diagnostic and monitoring utility.
Guru3D - Guru of 3D: PC Hardware Reviews and tests