https://sourceforge.net/p/x3d/discussion/169856/ Various discussions of QA/QC of x3d sourceforge products (if not otherwise specified on their respective websites). 1) XML Schema 2) X3DUOM 3) X3DJSAIL 4) x3d.py 5) X3D-Edit For X3DSONLD: https://github.com/coderextreme/X3DJSONLD/issues John