Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
UBCD4Win - "UBCD4Win is a bootable recovery CD that contains software used for repairing, restoring, or...
DriveImage XML - DriveImage XML is an easy to use backup and restore program for Windows XP and Vista. Part of Runtime's Data Recovery Software products.
Ultimate Boot CD - The last Boot CD you'll ever need. You need the Ultimate Boot CD if you want to: