Cegui.org.uk has information about Crazy Eddie's GUI System, a free library.
Main Page - CEGUIWiki
Excerpted from the website:
- Crazy Eddie's GUI System is a free library providing windowing and widgets for graphics APIs / engines where such functionality is not natively available, or severely lacking. The library is object orientated, written in C++, and targeted at games developers who should be spending their time creating great games, not building GUI sub-systems!
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