X-Plane plugin that displays a tablet to aid VR usage
FlightGear Flight Simulator: free open-source multiplatform flight sim
sandbox particle simulator that obeys schrödinger's equation
a very lightweight advanced terrain-rendering and 3D map rendering sys
extreme 3D flight simulator with advanced terrain rendering
Simulator for dynamical systems
3-DPhysicsSim is an interactive 3-D physics simulator.
Science simulator and advanced calculator based on modules