CleanMyMac X - Clean, protect and speed up your Mac
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Outbyte - Outbyte is a cmprehenmsive computer repair tool that is built to address a range of various system issues like clean up your drive, optimize performance and enhance privacy or security.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Tweaking - Tweaking is an all-in-one repair tool, helping you to fix large Windows problems such as registry errors, file permissions, as well as other issues with Internet Explorer, Windows Update, Windows Firewall, and many more.