Donald reminded me on IRC this afternoon. I have the GPL’ed code for
Biodesigner (and rendering).
I think this is a great program for protein / biomolecule viewing
(and minimal editing). The author was (is?) rewriting into wxWidgets
under the GPL. I asked him about working on Open Babel integration
and he sent me his working copy.
I don’t think he’d have a problem about studying some of his
rendering code for Avogadro. Send me a note if you’d like a copy.