The Umple Model-Oriented Programming Technology
an Open Source BPMN 2.0 / DMN 1.1 Modeler
Database ERD- design tool with Reverse Engineering
PUed - PlantUML Editor
Declarative PageObject description
Database to PlantUml or yEd diagrams.
Plugin for MagicDraw to support MBSE with SysML
Code generation from UML to any language (Java, Objective-C, PHP...)
An editor for presentation models and presentation interaction models