1)   R-Wipe & Clean 7.9
A complete solution to wipe useless files and keep your computer privacy. Irretrievably deletes private records of your on- and off-line activities. Includes Popup Blocker and supports most of the Internet browsers. A free 15-day trial version.

 2)   Advanced File Shredder 1.15
Advanced File Shredder securely erases files or folders on your PC using seven pass US Government standard wiping and cryptographically strong random number key. Files shredded with this eraser software cannot be restored by any data recovery tool.