John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
FCorp My Desktop - "ALL-IN-ONE" Desktop Related Tools.
Wallperizer - Wallperizer is a desktop wallpaper changer.
Artpip - Artistic wallpaper for your desktop, refreshed daily.
Adolix Wallpaper Changer - Adolix Wallpaper Changer- free wallpaper changer software.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.