1)   ArchiCrypt Shredder 3.1.2
In addition to the permanent deletion of sensitive data, ArchiCrypt Shredder cleans the free space on hard drives, removes tell-tale file fragments from cluster tips, wipes out traces from the last online surfing and deletes entire hard drives.

 2)   Data Destroyer 6.57
A program for secure file deletion and disk wipe which destroys (by overwriting) data in multiple files and multiple folders on floppy, ZIP or hard disk so that the data cannot be recovered. Single-file or batch-mode operation.

 3)   PowerKey 2.11.01.22
PowerKey is an advanced encryption toolkit with many unique features which you won't come across in other products of such a kind available online. It allows you to perform block encryption of files and folders, wipe and other.