Where can I get a list of all released versions?

The glext.h header file lists 1.2, 1.3, 1.4, 1.5, 2.0, 2.1, and 3.0.

However, there was obviously a 1.1 and was there not a 2.1.1 and a 1.2.1?

Are there others I am missing?

You can check specifications for published versions: http://www.opengl.org/documentation/specs/

Haha… I should have thought of that… thanks :wink: