Poseidon for UML is a professional UML CASE tool. With roots in the open source
project ArgoUML, it has evolved into a world-class modeling tool. Its superior
usability makes it the easiest tool to learn and work with.

With UML standards compliancy, it facilitates interoperability with other sets
of tools while maintaining investment security at an outstanding price-
performance ratio.

It is available in different editions to meet the needs of a wide range of
users.

WWW: http://www.gentleware.com/