The Imixs-Workflow project has started a new modelling tool which will be 100% compatible with the BPMN 2.0 standard. The new modeler tool will be based on the Eclipse BPMN2 Modelling Framework and extends the BPMN 2.0 standard with the aspects of a human based workflow model executable on the Imixs-Workflow Engine.
Imixs-BPMN will be open source and takes the full advantage of all the capabilities of the BPMN standard and complements them with the features of a powerful workflow engine.
You can follow the project on GitHub.