Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
WLPPR - Beautiful mobile wallpapers made from satellite imagery
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
Wallpaper Wizard - Wow-worthy backgrounds for Mac
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Visuals of Earth - Gorgeous, minimal wallpapers for your phone