
Here are my "25 Coolest Linux Wallpapers" in no particular order:
1. Use Linux

2. Zenwalk Man

3. Tux Reading

4. Zenwalk Day

5. Drinking Tux

6. Tux Cool Green

7. Think Linux

8. Slackware Baby

9. Penguins

10. Tux Keyboard

11. True Open Source

12. Open Source System

13. Tux Surfer

14. Pengo Cola

15. Tux in Black

16. Gnome Ring

17. Gnome Tabloid

18. Blue Glow Tux

19. Easy Rider

20. Gnome Gallery

21. Windows on Fire

22. Gnome Coffee

23. Gnome Bus

24. Linux Village

25. Crop Circle Tux

Note: To download, click on the image to enlarge, and then right click and save.
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You may also want to check out my other Linux-related wallpapers:
-25 Coolest and Funniest Tux Wallpapers
-20 Coolest Linux Distro-themed Wallpapers