Modelworld - free online modeler and diagram editor for BPMN, DEMO, Archimate, UML, Business and Software architecture

Modelworld is a free online modeling tool and repository for the collaborative modeling of business architecture and information systems that runs instantly in your browser. You can test and validate your models in the online prototyping engine. Most of the model templates on modelworld are based on existing modeling methodologies such as BPMN, UML, Archimate, IDEF and DEMO.