Gnome Chemistry Utils software provides C++ classes and Gtk -2 widgets related to chemistry. They are used in both Gnome Crystal and GChemPaint. To compile and use the Gnome Chemistry Utils, you need libglade-2, and GtkGLExt, and their own dependencies. Everything except GtkGLExt is available from the Gnome repository or one of its mirrors. The GtkChem3DViewer widget also needs Gnome-vfs and OpenBabel to be built. GChemistry Utils are distributed under the LGPL license. Gnome Chemistry Utils are in an early development stage. Three widgets: - a periodic table, - a crystal structure viewer, - a 3D molecular structure viewer. The last widget is also accesible as a Bonobo control. The Gnome Chemistry Utils are the basis for the development of both GChemPaint and Gnome Crystal Requirements: