We have covered quite a few themes for Windows 7 for your personalization. If you are looking to personalize your copy of Windows 7, then the best places to start is the Windows Personalization Gallery hosted by Microsoft. Microsoft has released new set of themes for Windows 7 and these are available for free download. Microsoft has been regularly updating the Windows 7 gallery with good sets of themes.
The new themes available are Cats Anytime, Dogs in Winter, Summit on the summit and the previously released Twinkle Wish.
These are themes on the Windows Personalization Gallery that users can grab at no charge at all and modify their Windows 7 desktops accordingly. You can also look at the various other themes also available in the personalization gallery.