X3D is the open-standard format for 3D graphics scenes on the Web.
Fractal planet and terrain generator
A designer’s program for describing parts of the building
A C++ library to easily create GUI-editable objects
Cuts 3D objects from polystyrene foam (EPS/XPS)
A php script for generating Rubik's cube visualisations
The X3DV Module Suite is a free set of Netbeans modules to code in X3D