TechTool Pro - Techtool Pro is a robust hardware diagnostic tool available for Macintosh.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
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.
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
DriveDx - DriveDx is advanced drive health diagnostic and monitoring utility.
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.