Windows desktop is not as pretty as Mac, especially the aging Windows XP. There are various theme software that works with Windows, but most of them are pricey. Recently LifeHacker has posted a way to minimalistic but beauty dekstop using Enigma installer.
Enigma desktop was started when a LifeHacker reader, Kaelri posted his desktop on Show and Tell flickr group. Now, he is published Enigma desktop installer for windows. Enighma rely using Sumarize, Rainlendar and other applications to spice up the interface.
If you are looking for a fresh look for your Windows desktop, you should try Enigma.