These are the wallpapers that I did for the Linux distros I've been using through the years.
You can find wallpapers for Ubuntu, BodhiLinux, Sabayon, PCLinuxOS, Debian, Slax, DamnSmallLinux, KDE and even one for Bill's distro.
To download the wallpapers, you got to hover your mouse on the thumbnail of the wallpaper you want. A diskette will appear so you can download
the wallpaper in a high res version.
If you don't find the resolution you want, maybe there is one for you in a gallery I got at opendesktop.org.
All the images are under the GPL License, so they are free to use.