Those of you that are Mac-based may be interested: I am making a public
beta release of my SNAFU general network analysis utility available as
freeware. It has a range of common metrics and graph generation
methods, but it isn't comprehensive yet. Requires system 7.6.1 / 10
MEGS ram or higher (recommended: system 9 / 60 megs RAM); carbon
compatible. Caveat emptor. Visit
http://www.networkinsight.net/software.htm for download.