CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
R-Wipe&Clean - R-Wipe&Clean is a complete R-Tools answer for wipe futile records and keep up your PC protection.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Clean Temporary Places - Clean Temporary Places is a cleaning tool that lets you clean temporary files to free up some space on the disk and get rid of disk error, disk defragmentation, etc.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Cocktail - General purpose system modify/repair utility