Nothing is more difficult than simplicity. MolScript is a program for creating molecular graphics in the form of PostScript plot files. Colour, grayscale, shading and depth cueing can be applied to the various graphical objects.
Source code is provided.
Remarks Output is publication quality. For a simpler ribbon program available on the Macintosh look for MacInPlot at this site. In order to obtain the program you need to fax a signed license to the author.