WallpaperCave
wallpaperCave is a community sharing hundreds of cool wallpapers daily! Free downloads - More than 7 million wallpapers!

Wallpapers.com
Wallpapers.com has millions of beautiful HD wallpapers.

SimpleDeskTops.com
A collection of wallpapers designed to make your computer beautiful without distraction.

Pexels.com
Free wallpaper photos are available in many different types, screen sizes, and resolutions.

Wallpaper Abyss by Alpha Coders
Wallpaper Abyss has over 140,000 wallpapers in variety of categories. New wallpapers are added every week.