I use GenMyModel, first released in 2013. It’s a real UML modeler, not a drawing tool. Your diagrams are UML-compliant, generate code and can be exported as UML/XMI files. It’s web-based and free so it matches your criteria.
I use GenMyModel, first released in 2013. It’s a real UML modeler, not a drawing tool. Your diagrams are UML-compliant, generate code and can be exported as UML/XMI files. It’s web-based and free so it matches your criteria.