Ortep-3 is the Oak Ridge National Laboratory program by M.N.
Burnett and C.K. Johnson. As seen from the following screen dump, the GUI
version by Louis Farrugia has put a complete Graphical User Interface around
ORTEP and includes, Windows Edit Copy, and links to RASTER3D and Povray for
photo realistic rendering of structures.
Obtaining the Licence file for Ortep-3
Downloading and installing Ortep-3