FOX is a C++-based toolkit that was designed for developing graphical user interfaces easily and effectively.
It offers a wide and growing collection of controls, and it provides state-of-the-art facilities like drag-and-drop, selection and OpenGL widgets for 3D graphical manipulation.
FOX also implements icons, images and user-convenience features like status-line help and tool tips.
Tool tips can even be used for 3D objects!
The program now comes with support for RIVA TNT/RIVA TNT2 OpenGL.