Umbrello

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Umbrello UML Modeller is a Unified Modelling Language (UML) diagramming tool from KDE

UML allows you to create diagrams of software and other systems in a standard format called Unified Modelling Language i.e. UML (www.uml.org).

Content of diagrams can be exported into code. Existing code files can be parsed and imported to be used in diagrams.

The following diagram types are supported:

use case diagram
class diagram
sequence diagram
collaboration diagram
state diagram
activity diagram
component diagram
deployment diagram
entity relationship diagram

The Umbrello home page is at uml.sourceforge.net. The source code can be found on websvn as part of the kdesdk package. Screenshots are found on this page.

Mailing lists are:

Vision

Umbrello is in a good state, when you are able

to parse its source code,
to draw diagrams and explore its architecture, classes and code
make changes to it
and generate the code again out of its model, so that you are ready to compile it again.

Or in other words, when you can use Umbrello for developing and improving itself.