Diskdeleter - Diskdeleter is data removal software that helps protect your privacy by securely deleting data from your hard drive.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Blancco Drive Eraser - Hard Drive Erasure Software
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
WipeDrive - Download WipeDrive Home for free using discount code: HOMEFREE