CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Diskdeleter - Diskdeleter is data removal software that helps protect your privacy by securely deleting data from your hard drive.
Avast Cleanup - Next generation tuneup and cleanup for your PC
Blancco Drive Eraser - Hard Drive Erasure Software
Advanced System Optemizer - Clean, optimize and personalize your PC
CleanMyPC - A smart cleaning tool for a better-running computer.