SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Avast Cleanup - Next generation tuneup and cleanup for your PC
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Kerish Doctor - Kerish Doctor 2015 is an all-in-one solution for automatic maintenance of Windows-based computers.