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
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
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.