Graph Visualization Software from AT&T Laboratories and
Bell Laboratories (Lucent Technologies)

These programs licensed under the terms described in the 
Web page http://www.research.att.com/orgs/ssr/book/reuse.

The package contains:
    dotty - customizable X windows graph viewer written in the Lefty editor
    tcldot - customizable TCL/tk graph viewer written by John Ellson
    dot - batch program for drawing directed graphs as hierarchies
    neato - batch program for drawing undirected graphs using Kamada-Kawai
        spring models

WWW: http://www.research.att.com/sw/tools/graphviz/