Kefir is a code sketcher based on tepache that uses pygtk and libglade. Kefir creates a set of wrapper classes around the top level glade widgets in a glade file, to allow the programmer to concentrate on writing a program instead.
GtkGLExt is an OpenGL extension to GTK+. It provides additional GDK objects which support OpenGL rendering in GTK+, and GtkWidget API add-ons to make GTK+ widgets OpenGL-capable.