Free Secure Delete Utilities: Blowfish vs. Eraser

Sometimes, you need to make sure that a file you’ve deleted is really gone. I use about 7-8 different computers in a typical week, and on all of them I use utilities that do daily secure wipes of all free space.
Fortunately, there are some very good freeware apps to accomplish this.
For the most part, I use Blowfish Advanced CS, which integrates Bruce Schneier’s famous encryption algorithm (featured once on 24). Fro my experience Blowfish Advance CS has a very small footprint and is very fast.