TechTool Pro - Techtool Pro is a robust hardware diagnostic tool available for Macintosh.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
DriveDx - DriveDx is advanced drive health diagnostic and monitoring utility.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
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.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.