CleanMyMac X - Clean, protect and speed up your Mac
Wise Care 365 - Wise Care 365 is a bundle of important registry, disk, and other system utilities for your PC.
Stellar SpeedUp Mac - Stellar SpeedUp Mac is one of the best software for the Mac OS X operating systems that is designed to enhance the performance of the Mac devices.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.