an Open Source BPMN 2.0 / DMN 1.1 Modeler
Domain-Driven Design sample application
Open-source code generator for Simulink/Stateflow
Code generation from UML to any language (Java, Objective-C, PHP...)
A tool for visualization and analysis of logs as sequence diagrams
Prototype editor for the SDEM Mapping Language
Java library implementing a state machine by the UML standard.