Satscape :

Satscape is a Freeware Program for the PC. It produces real-time displays of where any Satellite is, and predicts passes for your locale. There are about 8000+ satellites in orbit, a lot of these are just junk and debris such as discarded rocket bodies, but quite a few are working Satellites.
Their positions can be calculated very accurately using pure maths, no need for a huge radar dish in your back garden. Satscape will do the maths for you, and present their positions in a nice graphical way. Passes over your part of the world can be predicted weeks in advance in a matter of seconds.
You don't have to use or have access to the satellites, as it will even predict when the 150 'Brightest' satellites pass over, so you can SEE them, and impress friends with your "psychic" abilities by predicting to the nearest second when they are about to pass over.
It can currently track 500 satellites simultaneously, with various graphically rich Map Views with ground tracks and footprints, Horizon view, tabular list and more. It's highly graphical, and has optional speech to announce satellites as they come into range. Tracking Data known as "Keplerian Elements" are used to work out their positions. Updating the Keplerian elements couldn't be easier, just one click from the menu, and it will connect via your Internet connection, and update them, making Satscape one of the easiest and most up-to-date Satellite Tracking programs available.

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