Umbrello

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

UML allows you to create diagrams of software and other systems in a standard format ([1]).

Existing code files in various languages can be parsed and used in the diagrams. The available classes can be written to code files also in various languages.

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