NTLite - The Ultimate Windows Customization Tool
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Win Toolkit - BUGS: Do not post bugs in the comments.
SKTools - SKTools is a multi-featured and easy-to-use application that is bundled with over 60 tools to help you boost the performance of the system.
WinReducer - Customize Windows (Integrate cursors, themes, wallpapers or change files to improve Windows...
NETGATE Registry Cleaner - NETGATE Registry Cleaner cleans and defragment your registry.