Check out this UML tool, bouml on pkgsrc-wip at www.sourceforge.net!  -- 
all the diagrams you could want, holds your source, generates your 
source, good for C++, JAVA, & IDL.  I think this is an excellent piece 
of work, so much so I packaged it.

Author's site is http://bouml.free.fr, however, please send your package 
questions to me.

If anyone has a way to test for the definition of QTDIR in a way better 
than what I have, please let me know!
(Thanks Obata Akio for telling me to set c++ as the required compiler to 
get libtool to work!)

To get the source, cd to /usr/pkgsrc/devel.  Then, checkout wip/bouml.  
Next, make the package and install it.

$cd /usr/pkgsrc/devel
$cvs 
-d:pserver:anonymous@pkgsrc-wip.cvs.sourceforge.net:/cvsroot/pkgsrc-wip 
co -P -d bouml wip/bouml

$make
$su
#make install