Becrux Wally - Wally is a Qt4 wallpaper changer, using multiple sources like files, folders, FTP remote folders, Flickr, Panoramio, Ipernity, Photobucket, Buzznet, Picasa, Smugmug, Google, Vladstudio and deviantART images. Now it's available in many languages!!
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
DesktopSlides - DesktopSlides is a light and user friendly desktop wallpaper changer for windows.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
Random BackGround - Random BackGround desktop wallpaper slideshow with advanced features for Windows
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.