3,365 apps tracked 0 new today 17 updated today Synced 4m ago

Apps / Gaphor

Gaphor

Simple UML and SysML modeling tool

Arjan J. Molenaar ✓ Verified

org.gaphor.Gaphor
View on Flathub ↗

Gaphor is a UML, SysML, RAAML, and C4 modeling application. It is designed to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models.

Gaphor provides four modeling languages: UML, SysML, RAAML and C4 and makes them accessible to beginners.

Report an issue ↗Website ↗Donate ↗Source code ↗Help ↗Subscribe via RSS

Screenshots

The Gaphor main window
The Gaphor main window
Sequence diagram
Sequence diagram
Customizable styling
Customizable styling
Dark mode
Dark mode

Observed history

App ChangeVersionWhen ↓
updated3.3.28 Oct 2026

Upstream releases

Release notes supplied by the developer. These dates are not Flathub package publication times.

3.3.22 May 2026

Bug fixes:

  • Fix translations missing for wheel and flatpak installers
  • Fix missing translations for French and Chinese
  • Set html-report default zoom level to 1
  • Add missing html-report files to Windows and macOS installers

Internal changes:

  • Fix wrong repository access for website deploy update
  • Simplify readthedocs install process
3.3.115 Apr 2026

Bug fixes:

  • Windows: fix toolbox icons missing
3.3.012 Apr 2026
  • Add HTML report generator
  • Add an initial doodling language with simple shapes
  • Add help menu for documentation
  • Update styling of shortcuts menu
  • Stereotype updates for interfaces and operations
  • Automatically update new releases on winget

Internal changes:

  • Improvements to simplify packaging
  • Fix codespaces by updating the base image

Bug fixes:

  • macOS: Fix Gaphor crashes when dragging elements to a diagram
  • Ensure Italian translations are built
  • Fix crash when running gaphor with the --profile option
3.2.09 Nov 2025
  • Troubleshooting info can now be found in the About dialog
  • Introduction of CSS classes: .item for all items you put on the diagram
  • Improved updates in Model Browser for attribute/parameter types a.o.
  • macOS: native window decorations and window menu

Internal changes:

  • Model elements can not only be queried from their authoritative model
  • Gaphor requires Python 3.12 or newer (was 3.11)
  • Use Python native enumerations (enum module) in data models
  • Improvements to setting modeling values to strings instead of literal strings

Bug fixes:

  • Fix save for new models
  • Fix message (sequence diagram) name placement
  • Windows: set English as the default installer language
  • Allow Rubberband selection in diagram frame