Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
Dism++ - Dism++ is a free portable Windows optimizer and manager.
BartPE - Bart's PE Builder helps you build a 'BartPE' (Bart Preinstalled Environment) bootable Windows CD-Rom or DVD from the original Windows XP or Windows Server 2003 installation/setup CD, very suitable for PC maintenance tasks.
Winbuilder - "WinBuilder is an engine designed to build and customize boot disks (Live CDs) based on...
NTLite - The Ultimate Windows Customization Tool
UBCD4Win - "UBCD4Win is a bootable recovery CD that contains software used for repairing, restoring, or...