Kuvva - Kuvva is the source for beautiful wallpapers.
Splashify - Beautiful desktop wallpapers for Mac and Windows
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!!
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android