CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Pegasun System Utilities - Pegasun System Utilities is one of the best means for enhancing the performance of the PC.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Mz Ultimate Booster - Mz Ultimate Booster is the part of Mz Utilities and called to be one of the most powerful and automatic tweakers available over the internet for the Windows users.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.