FCorp My Desktop - "ALL-IN-ONE" Desktop Related Tools.
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Wallperizer - Wallperizer is a desktop wallpaper changer.
Artpip - Artistic wallpaper for your desktop, refreshed daily.
CommandLine Wallpaper Changer - Change Wallpaper From little Command Line Application
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.