an Open Source BPMN 2.0 / DMN 1.1 Modeler
Modeling tool supporting UML, BPMN and other standards
SYSMOD4MD is a plugin for the modeling tool MagicDraw (aka Cameo)
A graphical editor for PlantUML diagrams.
Design your ORM application in a platform independent way.
ATG Repository Modeler
AgilPro is an Eclipse based business process modeling suite