Hi,

Anyone know of a good (and preferably free) tool for drawing UML sequence
diagrams ?

Also, it would be nice to have a tool which permits some "unstructured" design,
just for holding thoughts about how to approach things......What I mean is to be
commit elements of a problem to the tool in any format and be able to just keep
things/link things together.
 A bit like a knowledge 'explorer'.....I have seen some of these around but
never thought any one really did the job. Anyone know of one that "cuts the
mustard" ? (Aside from the good old pencil and paper, that is).

Thanks in advance,

Dan