No vendor lock-in: Gaphor written in Python and is 100% Open Source, available under a friendly Apache 2 license.
Beginner or Pro
Whether you’re a casual modeler documenting a project or a Model Driven Development expert, Gaphor has got you covered.
UML is a graphical modeling language, so all information you put in the model is visible in the diagrams. For example, stereotypes are modeled in diagrams. No hidden panels and property pages. Just diagrams!
Gaphor is extensible. Plug-in a code generator or export your diagrams for documentation. Create your own extensions and access them through the GUI or CLI.
Gaphor implements the UML, SysML, and RAAML OMG standards. It also includes support for the C4 model for visualizing software architectures.