Here are some of the most stunning Windows 7 Themes to be released so far:

1. Countries

2. Windows 7 Generic

3. Michael Jackson

4. Green Skull Visual Style by ~TheDarkenedPoet

5.  Waterbomb  theme by ~ADRENALIZE81

6. Natural By ~PHS2

7. WoodStock Theme By ~Marcus-Deviant

8. Windows 7 Red

9. Windows 7 Black Glass

10. Blue Theme By ~MOLINAROSP

11. Trans Themepack By ~Crusader1080

12. Underoath Theme By ~Bobmat4

13. Simple Black Theme

14. Waterfall Theme

15. Coral Reef Theme

16. OSX Theme For Windows 7

17.  Tribal Orange Theme

18. Aternative Windows 7 Theme

19. Desk-09 Theme For Windows 7

20. Flower Power

Thanks to:

Addictive Tips

Deviant Art