Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
FCorp My Desktop - "ALL-IN-ONE" Desktop Related Tools.
WallpapersEveryday - Gorgeous wallpapers on your desktop in just one click or auto-delivered at chosen time intervals.
Artpip - Artistic wallpaper for your desktop, refreshed daily.
Moody Desktop - Change wallpaper timely, with shuffle and time you will have a new wallpaper every login. Specify multiple directories.