SimGear: SimGear (a set of open-source 3d simulation libraries) SimGear: SimGear: SimGear is a set of open-source libraries designed to be used as SimGear: building blocks for quickly assembling 3d simulations, games, and SimGear: visualization applications. SimGear: SimGear: SimGear: homepage: http://www.simgear.org/ SimGear: SimGear: SimGear: