John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
My Daily Wallpaper - Wanna download automatically every day a new and beautiful wallpaper for your Windows desktop?
FCorp My Desktop - "ALL-IN-ONE" Desktop Related Tools.
Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
Wallperizer - Wallperizer is a desktop wallpaper changer.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.