The DOCK suite of programs is designed to find favorable orientations of a ligand in a "receptor." It can be subdivided into (i) those programs related directly to docking of ligands and (ii) accessory programs.

DOCK runs on fermat (SGI); you need to add the following line to your path in the .login or .cshrc file:

set path = ( $path /friedel1/users/sergio/dock35/bin )

DOCK Manual

Check out DOCK home page for more details.