Contributed software lefty-grace : user interface enhancements to dotty Robert M. Grace rgrace@draper.com dirgraph : Perl script for creating a dot graph file from a directory hierarchy Diomidis Spinellis dds@aueb.gr dotmcl.pl : Perl script for clustering nodes in a dot graph. Vladimir Alexiev vladimir@worklogic.com gprof2dot.awk : Awk script to convert gprof output into a dot graph. Stephen C. North north@research.att.com webdot.cgi : Perl front end to run dot as a web service. John Linderman jpl@research.att.com prune : program to prune directed subtrees Marcus Harnisch marcus.harnisch@gmx.net java-dot : java classes for creating a graph in the dot language Florian Liekweg liekweg@ipd.info.uni-karlsruhe.de