gaphor: gaphor (Simple UML and SysML modeling tool) gaphor: gaphor: Gaphor is a UML, SysML, RAAML, and C4 modeling application. It is gaphor: designed to be easy to use, while still being powerful. Gaphor gaphor: implements a fully-compliant UML 2 data model, so it is much more gaphor: than a picture drawing tool. You can use Gaphor to quickly visualize gaphor: different aspects of a system as well as create complete, highly gaphor: complex models. Gaphor provides four modeling languages: UML, SysML, gaphor: RAAML and C4 and makes them accessible to beginners. gaphor: https://github.com/gaphor/gaphor