Free Web BPMN Modeler [[https://bpmn.io/|Website]]

  * [[https://forum.bpmn.io/t/click-event-on-modeler/4097|OnClick Event]]
  * [[https://forum.bpmn.io/t/how-to-set-a-property-to-an-element-by-elementid/1132/2|Add Custom fields]]