Normally, a deleted file is only removed from the directory entry of the file system and still can be easily recovered back from a file recovery software. If you want to completely wipe out any trace of a file, a file shredder or permanent file deleter can do the trick. It completely overwrites junk characters on the space occupied by the original file and makes it unrecoverable. Permanent Eraser It is one of the best file erasing utilities for Mac OS X. This excellent software not just deleted files from hard drives, but also permanently erases the files from CD/DVD. File Shredder It is a powerful file deleting software for Windows platform. It is a freeware and very light on system resources. File shredder fills the file space with random binary junk making completely unrecoverable. AbsoluteShield File Shredder Yet another powerful and free file eraser for Windows. It erasing process is lightning fast and is ideal for permanently deleting files in bulk. Heidi Eraser This file shredde...