Avast Cleanup - Next generation tuneup and cleanup for your PC
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
CleanMyMac X - Clean, protect and speed up your Mac
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
TweakPower - TweakPower is a versatile PC cleaning optimization and backup software that lets you fix all the problems that occur in your PC as well as fix common problems.