Splashify - Beautiful desktop wallpapers for Mac and Windows
Satscape - A satellite tracking program for Windows, Mac OS and Linux.
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Celestia - Real-time 3D visualization of space