Dism++ - Dism++ is a free portable Windows optimizer and manager.
NTLite - The Ultimate Windows Customization Tool
WinReducer - Customize Windows (Integrate cursors, themes, wallpapers or change files to improve Windows...
Winbuilder - "WinBuilder is an engine designed to build and customize boot disks (Live CDs) based on...
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
RyanVM integrator - Application to slipstream a service pack into windows xp, as well as all hotfix updates to date.