MetaUML is a GNU GPL MetaPost library for typesetting UML diagrams,
using a human-friendly textual notation.

Here's what you can do with MetaUML (also see the FAQ):

    * Create UML diagrams readily usable in a LaTeX article or book.
    * Create independent PDF-s
    * Create jpeg-s, png-s etc.

WWW: http://metauml.sourceforge.net/