Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
NTLite - The Ultimate Windows Customization Tool
UBCD4Win - "UBCD4Win is a bootable recovery CD that contains software used for repairing, restoring, or...
Win Toolkit - BUGS: Do not post bugs in the comments.
Ultimate Boot CD - The last Boot CD you'll ever need. You need the Ultimate Boot CD if you want to:
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.