Hi,
I have ported GLUS, a helper library for OpenGL and OpenGL ES to the Raspberry Pi. Also, I have converted 3 of the 21 OpenGL examples to the Raspberrry Pi. Source code from the helper library, the examples and the assets itself are included.
Screenshots: http://nopper.tv/opengles.html
Download: https://github.com/McNopper/OpenGL_ES
How To: https://github.com/McNopper/OpenGL_ES/wiki
The examples do also run on Windows.
Have fun!
Regards Norbert
PS: If I have time, I will convert more examples.