"mac-opengl" Mailing List (Apple) - This mailing list is to allow discussion on the use and programming of the OpenGL technologies on the MacOS. - http://lists.apple.com/mailman/listinfo/mac-opengl
Jack's Macintosh Software - Jack's Jansen's Mac software page, including zlib and libpng ports - just the thing for loading those OpenGL textures. - http://www.cwi.nl/~jack/macsoftware.html
Quesa - High level 3D graphics library which offers binary and source level compatibility with Apple's QuickDraw 3D API. Quesa can sit on top other lower-level APIs such as OpenGL. - http://quesa.designcommunity.com/