Satscape - A satellite tracking program for Windows, Mac OS and Linux.
Downlink - Real-time satellite imagery on your desktop
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Satellite Eyes - Changes your Mac wallpaper to a satellite map of your local
Orbitron - Orbitron - Satellite Tracking System written by Sebastian Stoff.
Spire - The first activity, breath & state of mind tracker