BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
ControlUp - ControlUp is a computer management & monitoring platform for managing Windows servers, workstations and user sessions.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
NirLauncher - Collection of more than 200 portable utilities from NirSoft
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.