During numerous hours of websurfing I stumbled across the OpenGL Window Framework. This is a thin layer on top of OpenGL to make extra nice for C++ developers. Unfortunately it does not seem to be actively developed.
What it provides is a nice C++ interface for OpenGL with respect for making window contexts. It gives you access to extensions via the Glee library. It gives you an enumeration framework for modes and features, and also there are design considerations for multi-threaded programming which is important in this day and age.
It's a very tightly focussed library designed for making using OpenGL and creating the windows for it much easier, and it seems to do that pretty well.