NTLite - The Ultimate Windows Customization Tool
Winbuilder - "WinBuilder is an engine designed to build and customize boot disks (Live CDs) based on...
Win Toolkit - BUGS: Do not post bugs in the comments.
AOMEI PE Builder - Free tool to create bootable USB drive, CD/DVD or ISO file based on Windows PE.
WinReducer - Customize Windows (Integrate cursors, themes, wallpapers or change files to improve Windows...
Dism++ - Dism++ is a free portable Windows optimizer and manager.