Inferno is a free stand-alone application that can delete any file using a variety of overwrite patterns, including two that comply with the Department of Defense and the Gutmann overwipe pattern. Inferno can also encrypt and decrypt files using superstrong AES 256-bit encryption.

Inferno is U3-compliant, it enables you to have it installed on your flash drive and use it on any compatible computer.


Main download: author's site

Note: program requires VB 6.0 runtime in order to run, you can find it here.