an Open Source BPMN 2.0 / DMN 1.1 Modeler
The Umple Model-Oriented Programming Technology
Syntax tree editor for rapid annotation of existing text
Domain-Driven Design sample application
Free software to validate BPMN business process diagrams.
Imixs Workflow - the open source business process management
"black technology" will improve development productivity by 1.5 to 5
Declarative PageObject description