X3DV Module Suite
The X3DV Module Suite is a free set of Netbeans modules to code in X3D
...With it, you can create virtual worlds in 3D, using the great edition features of Netbeans.
This project is not developed since years ago, so you may need to do something to update from Netbeans 6 to modern Netbeans, or use an old version with it. I am in the process of reviewing it and fix it.