Awesome

MyGUI is a cross-platform library for creating graphical user interfaces (GUIs) for games and 3D applications.

• Website: http://mygui.info/

• There you can find basic information about how to build MyGUI: http://www.ogre3d.org/tikiwiki/MyGUI+Compiling

• Note: support for Ogre3D 2.0 is currently in beta state and available in a separate branch.