Gaphor, the essence of UML Modelling
Gaphor is an easy to use modelling environment. This means that you are able to create nice UML diagrams for documentation and to assist you with design decisions. Gaphor will help you create your applications.
Gaphor has an UML 2.0 compliant data model. Have a look at the features page to see what Gaphor can do for you.
Gaphor aims for freedom. Freedom of software (Gaphor is GPL licensed) and freedom in modelling.
Make your Point
Modelling is about communication. It's about getting the picture. That's why Gaphor does not restrict the elements you can use in one diagram. If it makes sense to mix use cases and classes, do so.
An important design principle in Gaphor is that all information in the model should be represented in the diagrams. All Information should be accessible through the diagrams. That's why everything is modelled, even Stereotypes.