FlightGear Flight Simulator: free open-source multiplatform flight sim
Earth orbits and satellite coverage display in 3D on your laptop.
A real-time 3D Engine written in Ada
functions for 2D/3D graphics + realistic driving simulation
free implementation of the OpenGL Character Renderer
Pear3DEngine is a modern and modular 3D development framework
A simple web interface for Blender, for rendering animations..