GtkGLArea is an OpenGL widget for GTK+ GUI toolkit. GtkGLArea provides gdkgl, a wrapper around GLX functions, which is similar to the GDK that GTK+ is built upon. The widget itself is derived from GtkDrawingArea widget.

A number of application use this widget:
Celestia -- Real-time visual simulation of space
fsv -- 3D File System Visualizer
Gcad -- Simple 2D CAD application for GNOME
Ghemical -- Molecular modelling package
glChess -- 3D chess interface
Morpheus -- 3D Model viewer for GNOME desktop
Xtraceroute -- Shows path of IP packets graphically

It can be found online at

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