Wise Disk Cleaner - Clean junks of Browsers, remove junk and useless files of Windows and Defragment your disk. Wise Disk Cleaner can delete these unnecessary files on your hard disk to free up disk space and make your computer run faster.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Auslogics BoostSpeed - Auslogics BoostSpeed: Tune up Your PC for Peak Performance! . * Free trial lets you clean out junk files, enable several Live Speedup tools and run each of the 18 apps under All Tools once.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.