Sure Delete is a tool to completely remove data from any writable media.

Sure Delete 4.1.9 Description

Sure Delete is packed with features. Besides being able to wipe files Sure Delete now can wipe free drive space. So even if you forgot to delete the file via Sure Delete, you can just wipe the empty HD space, and you can be sure its gone. Another feature is the ability of the user to choose speed/security ratio. If you have a lot of time on your hands you could use the most secure but also the most time consuming type of wiping. However if you are short on time, and all you need is to prevent half educated snoops from recovering your data then you don't need as much security and you can set Sure Delete to use a little less secure but faster method of wiping. There are many more features which you'll just have to download Sure Delete to discover.