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
Advanced System Optemizer - Clean, optimize and personalize your PC
CleanMyPC - A smart cleaning tool for a better-running computer.