Xj3D
Xj3D is an open-source Java codebase for the X3D Graphics standard.
...Current status: active development with frequent updates. We have successfully ported the full codebase and history from the previous site to Sourceforge and are now following the Xj3D Evolution strategy. All open-source contributions are welcome.
Further details are available at https://savage.nps.edu/Savage/developers.html#Xj3D