Planetfall (Argus Press Software)

Planetfall is sci-fi business trading game. The players (game hasn't single player mode) command merchant Starfleet - they can travel between the different planetary systems (with changing business conditions), buy and sell various resources (6 - Uranium, Iron Ore, Machinery, Medical supplies, Computers and Gems), make money and collect them in banks. A game can have a maximum of 15 star-systems.