1. Dawn of Ubuntu, first appeared in Ubntu 7.04 the Feisty Fawn, I can still feel the magic of linux when using this desktop background.

 2. Mandriva

3. This one is some random wallpaper I found on a linux site, i have no idea in which distribution is included, if it is.

4. Fedora 8, the blue version of the wallpaper

5. Solid

6. Cent OS

7. Horos, included in KDE 4.6

8. Fedora 13

9. Gentoo Linux

10. KDE 4.2

11. Balanazan (found in the balanzan theme ofr ubuntu)

12. Ubuntu Gutsy Gibbon, the elephant skin