Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
GlobalXplorer - Become a space archaeologist
Splashify - Beautiful desktop wallpapers for Mac and Windows
Satellite Eyes - Changes your Mac wallpaper to a satellite map of your local
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
himawari.js - Real-time images of Earth from the Himawari-8 satellite