Tuneup Utilities is a cool windows tweaking utility. 

Features

Maintain System

Increase Performance

Fix Problems

Customize Windows

Free up disk space.

Uninstall programs.

The latest version is 2011 which costs you around $49, while you can get version 2010 . To get the TuneUp Utilities 2010 free. Visit the promotional page, enter your email address and captcha. You will receive an email with activation link.