http://www.opengl.org/
The Industry's Foundation for High Performance Graphics.
http://oss.sgi.com/projects/ogl-sample/registry/
OpenGL® Extension Registry.
http://developer.apple.com/graphicsimaging/opengl/extensions.html
OpenGL Extensions Guide.
http://docs.hp.com/en/B6196-90001/index.html
HP's Implementation of OpenGL.
http://www.gremedy.com/
gDEBugger.
http://www.geocities.com/SiliconValley/Vista/7336/robmpy.htm
Mappy - Map editor.
http://www.opengl.org/documentation/red_book/
The OpenGL Programming Guide - The Redbook.
http://www.opengl.org/documentation/blue_book/
The OpenGL Reference Manual - The Bluebook.
http://www.blender3d.org/cms/Home.2.0.html
Blender - Free 3d modeler.
http://www.it.jcu.edu.au/Subjects/cp2060/resources/docs/opengl.chi
http://www.it.jcu.edu.au/Subjects/cp2060/resources/docs/opengl.chm
OpenGL Programmer's Reference
http://www.ati.com/developer/
ATI tools/SDK/docs/etc.
http://developer.nvidia.com/page/home.html
NVIDIA tools/SDK/docs/etc.
http://developer.3dlabs.com/
Tools and infos about GLSL.
To be continued...