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
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
WipeDrive - Download WipeDrive Home for free using discount code: HOMEFREE