Modelio
Open source modeling environment
https://www.modelio.org/downloads/download-modelio.html
Main features:
- UML Modeler (UML diagrams)
- BPMN support integrated with UML
- Java code generator
- XMI import/export
- HTML model publishing
- Extension system
- Scripting language support (Jython)
Licenses: https://www.modelio.org/about-modelio/license.html