deletes junk files to free disk space and improve privacy
BleachBit frees disk space and maintains privacy. Cleans cache, Internet history, temporary files, logs, cookies, Firefox, Google Chrome, Flash, Windows, Linux, and more. Downloads are at www.bleachbit.org and source code is at GitHub.
FOG is a free open-source cloning/imaging solution/rescue suite. FOG can be used to image Windows XP, Vista, Windows 7 and Window 8 PCs using PXE, PartClone, and a Web GUI to tie it together. Includes featues like memory and disk test, disk wipe, av scan & task scheduling.
KillDisk is a program written in python for Unix based systems for wiping a hard drive. It can wipe a hard drive using all zeroes or random data, and as many times as you want to specify.
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DWIP is short for Disk Wiping and Imaging Tool. This tool is being built for Mississippi State Universities National Forensics Training Center for use on a live cd to give out to it's students.