OpenGL 3D GUI Engine and / or Assets

Question

Are there OpenGL 3D GUI libraries?

and / or

Are there any 3D assets, such as windows, lists, etc., that can be used in the 3D game engine?

Something like Age 3D is a great start, http://www.youtube.com/watch?v=Cq8Qs8lqqFA , but they are no more.

Answer 1

Something like Crazy Eddie GUI System ?

Answer 2

You might want to watch FLTK . Definitely still in development - the most recent weekly shot was released today.

Answer 3

Qt allows you to insert all GUI elements into the OpenGL viewport.

Answer 4

You can check it out: http://www.libnui.net/