Mission Control Windows 7 Theme!
Different active and inactive windows
And lots and lots of more goodies
How too add the theme
I would use Universal Theme Patcher, it works great and are free too use, you can get it here: http://www.windows7download.com/win7.../mnefyyoo.html
Read more about TRC here: http://virtualcustoms.net/showthread.php/31635-How-to-use-theme-resource- changer
Now you can go to your desktop, right-click and choose Personalize, and you will find it with the other themes you have installed.