FlightGear Flight Simulator: free open-source multiplatform flight sim
Air traffic control tower and radar simulator (solo + multi-player)
Opengate is a Jumpgate remake
Highly realistic and immersive model for Flightgear.
Fractal planet and terrain generator
A 3D simulator game where you can drive, fly, and sail
3D Space Drone Battle Simulator
a very lightweight advanced terrain-rendering and 3D map rendering sys
extreme 3D flight simulator with advanced terrain rendering
Articulated-body simulation engine written in C
A highly flexible 3D flocking boids simulator, conceived as a tool for