FlightGear Flight Simulator: free open-source multiplatform flight sim
An interactive viewer for three-dimensional chemical structures.
Earth orbits and satellite coverage display in 3D on your laptop.
3D Without Boundaries
3D .NET engine for Windows, Linux, Mac
Design and Display Happy Cube solutions
an interactive 3D viewing program
3d printing software
A C++ library to easily create GUI-editable objects
3D model viewer and world navigator.