GLUT/Tk , by Joseph C. Kończal, is a portable system for using GLUT to control 3d graphics from within Tk.
GLUT/Tk is a "light-weight" system that seeks to leverage GLUT and Tcl/Tk by tying them together in a stylistically consistent way with the addition of only a few commands to each. As a result, developers can code 3D applications, including graphical input, windows, and menus, that will port easily between Unix-based systems and Windows-based systems. Furthermore, there should be at most a negligible performance penalty, since the purely graphical operations are still programmed directly in OpenGL.