crystal-facet-uml is a desktop UML and SysML modeling application designed to document system and software architecture from multiple viewpoints.
It helps architects build a consistent set of diagrams by keeping element names, hierarchies, relationships, and shared model data aligned across the project, while storing that data in a JSON-based format that can be versioned alongside source code.
This is free and open source software.
Key Features
- Creates, modifies, and deletes UML and SysML diagrams, elements, and relationships.
- Maintains a shared meta-model so elements and relationships stay consistent across multiple diagrams.
- Supports part-automatic layout, with user control over messages and transitions in sequence and timing diagrams.
- Exports diagrams and models to SVG, PDF, PS, PNG, HTML, DocBook, JSON, and XMI formats.
- Offers both a graphical interface and command line operation for batch export, JSON import, and checking or repairing model files.
Website: github.com/awarnke/crystal-facet-uml
Support:
Developer: Andreas Warnke
License: Apache License 2.0

crystal-facet-uml is written in C. Learn C with our recommended free books and free tutorials.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

