1)   Mutilate File Wiper 2.95
Mutilate File Wiper is an easy to use file eraser that shreds sensitive files so they cannot be recovered or undeleted. For additional security, Mutilate's disk free space wiper will destroy previously deleted files on your hard drive.

 2)   FILExtinguisher 2.0
FILExtinguisher securely deletes all confidential information. FILExtinguisher offers 14 delete methods that vary from a fast zero-write to an extremely high security NATO level. Entirely wipe unallocated or slack space with ease.

 3)   NT Data Wiper 2.0
Advanced data erasure tool which removes all deleted confidential record information from your hard drive and safeguards the computer privacy. If you wipe already deleted files with NT Data Wiper, they cant be restored by any recovery tools.