Blank and Secure is a freeware tool that can be used to permanently delete files, making them irrecoverable. Simply drag and drop the files you would like to delete Permanently into the window and Blank and Secure will overwrite the data with Zeros, making the information not recoverable.
Disk Wipe is free portable data destruction or data deletion tool. It can be used to permanently remove data from hard drives, sd cards, USB drives, pendrives, mp3 players, cameras and other removable storage devices.
FreeRaser is a Free Portable tool that can be used to shred, destroy and permanently delete files from your computer. This file shredding tool is easy to use.
UltraShredder is a Portable application that allows a user to Securely Delete or Shred files. It does this by overwriting the information with random characters.