Wallpaper
Not the kind of wallpaper you would stick on your walls to make the room look nicer, but the kind that you plonk on your desktop to make that look nicer. All wallpapers are size 1024x768 but will automatically be resized to fit on most machines, if not then try them anyway, it might still look fine or you could resize it yourself if you have the know-how.
To use them, click on the colour of your choice below the desired wallpaper and it will be opened in a new window. When it has loaded most users should right click and from the menu, select 'set as background' or something similar.