"""
For mapping a complex org chart, dot / graphviz may be a better choice. It allows for expressing hierarchies, which may be tricky with general network software.
For complex layouts or data-driven diagramming the DOT language / graphviz is nice. Very short learning curve (e.g. can have your first graph in minutes by modifying an example), and excellent layout algorithm. Though if you want to fiddle with the layout manually it is not awesome. (though I expect Gelphi or other network software will be even worse in this respect)
""" For mapping a complex org chart, dot / graphviz may be a better choice. It allows for expressing hierarchies, which may be tricky with general network software.
For complex layouts or data-driven diagramming the DOT language / graphviz is nice. Very short learning curve (e.g. can have your first graph in minutes by modifying an example), and excellent layout algorithm. Though if you want to fiddle with the layout manually it is not awesome. (though I expect Gelphi or other network software will be even worse in this respect)
The manual is here:
http://www.graphviz.org/pdf/dotguide.pdf
I think Visio is built off graphviz There is something like 100 different apps that use it:
http://www.graphviz.org/content/resources """