Wallhaven - Your source for the best high quality wallpapers on the Net!
InterfaceLIFT - High-resolution widescreen wallpapers, desktop icons, and themes for Mac OS X, Microsoft Windows...
Simple Desktops - A collection of wallpapers designed to make your computer beautiful without distraction.
Wallpapers Now - Wallpapers Now is a specialized website from where you can get the HD wallpaper for free.
WallpaperFusion - The best multi-monitor and Eyefinity wallpaper images, all in one place!
Picky Wallpapers - Picky Wallpapers is a good website that has the selection of HD quality wallpapers only.