Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
My Daily Wallpaper - Wanna download automatically every day a new and beautiful wallpaper for your Windows desktop?
Splashify - Beautiful desktop wallpapers for Mac and Windows
Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.