Freefall HD is a virtual planetarium. It includes planets, the moon, stars, constellations, deep-sky objects, and satellites! Choose a location on earth and the time, and Freefall HD will show you whats up in the sky.
Freefall HD uses industry-standard SGP4 and SDP4 algorithms to predict satellite motion. Accurate satellite predictions require occasional updates using a free Space-Track account, but calculations for the other celestial objects do not.