Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
TweakVista - Microsoft has increased both the power and complexity of its popular Windows operating system with...
Mz Ultimate Tweaker - Mz XP Tweak (Mz Ultimate Tweaker)
Cache Status - Cache Status is an easy cache status and management tool located right in your address-bar.
7plus - Improving Windows, one by one
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.