[Free] New Free Secure File Wiping/Deletion Tool
You hear about people recovering secret data from hard disks sold at eBay practically every other month, even though the sellers have actually deleted their own files before selling. As everyone knows, deleting a file from your computer doesn't really clear it from your hard disk. It's still there and can easily be recovered by using data recovery programs. To really securely delete files, you need a proper wiping utility, like the latest addition to the Free Secure File / Disk Deletion (Wipe) Utilities page. This newest entry, Freeraser, is a file wiping utility, that you can use to thoroughly remove traces of a file from your hard disk.
There are other secure deletion tools on that page as well, including those that can thoroughly wipe your entire hard disk clean before you dispose of it or sell it.