Gaphor

Simple, powerful desktop UML and SysML modeling application.

Desktopfree

Gaphor is a free, open-source desktop application for UML and SysML modeling, with installers for macOS and Windows and a Python package on PyPI. It implements a fully standards-compliant UML 2 data model, supporting complex models across UML, SysML, RAAML, and C4 templates, and can also be scripted from Python or Jupyter notebooks. It is aimed at software architects and systems engineers who want an easy-to-use alternative to heavyweight commercial modeling tools.

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