Spire - The first activity, breath & state of mind tracker
Satscape - A satellite tracking program for Windows, Mac OS and Linux.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Pictogon - The fastest and easiest way to create interactive images
See A Satellite Tonight - Free web app to explore satellite locations.