File Shredder 

Windows does not physically remove deleted files from your hard drive. You think they are gone, but they can be easily recovered, including your financial information and sensitive business documents. Protect yourself! Free to try.
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FineCrypt Archiver 

FineCrypt Archiver is a powerful but easy-to-use file encryption software for protecting files on your computer with strong encryption algorithms. FineCrypt Archiver integrates with Windows shell and contains file wiping utility.
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Active Kill Disk - Hard Drive Eraser 

Active KillDisk is a quality security application that destroys data permanently from any computer that can be started using a DOS floppy disk. DoD 5220.22-M compatible
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AEVITA Tracks Eraser 

AEVITA Tracks Eraser is a slim and highly configurable data erasing program that will protect your computer privacy from nosy people. Using it, you can securely erase your usage tracks in Windows, Internet Explorer, MS Office and other applications!
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