Modelio 3.5.1 | An open source modeling environment (UML2, BPMN2).
Modelio is an open source modeling environment tool providing support for the latest standards (UML 2, BPMN 2,...). It can be extended by adding modules which add new functionalities. A large set of modules (free and open source) supporting code management (generation/reverse), modeling standards (TOGAF, SysML, SoaML,...), document generation,... is available from the Modelio Store.
UML modeler supporting UML 2 and all UML diagrams
Extension system by adding modules
Scripting language support (Jython)