Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Isometric - Create beautiful, abstract works of art & optical illusions
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
5K macOS Wallpapers - Every default macOS wallpaper – in glorious 5K resolution!
Planet Explorer - Interactive global satellite images