DBAN Windows, Mac, Linux
By blancco
For Everybody

Darik's Boot and Nuke ("DBAN") is a self-contained boot floppy that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.

For additional information about this software, please see this GROK article: DBAN: LSU Overview

K3b Linux
By K3b
For Everybody

K3b is a CD and DVD burning application for Linux systems optimized for KDE. It provides a comfortable user interface to perform most CD/DVD burning tasks like creating an Audio CD from a set of audio files or copying a CD.