http://nineveh.gl/
I think the only trouble, they say it's in objective C, and perhaps make a port to Glbasic can be a bit more coplex than do it in C++..
Well another free...
http://isgl3d.com/
NinevehGL looks cool and easy to use. But to download it, you must to register as beta tester and you get a binary library. This makes me think this can be converted to a paid framework later. But is a good framework.