[bshomoic]

does this work?

http://www.killdisk.com

[CA Conservative]

I haven't used that one, but it would probably do. And don't fall for the idea you have to wipe the drive 7 times. Once is enough. After that, the only way they might be able to recover something would be with electron microscopy. Unless you are doing something the NSA is interested in, they won't spend the time or money.