Gaphor is an open-source UML tool

UML tool

A UML tool or UML modeling tool is a software application that supports some or all of the notation and semantics associated with the Unified Modeling Language , which is the industry standard general purpose modeling language for software engineering.UML tool is used broadly here to include...

 for the GNOME

GNOME

GNOME is a desktop environment and graphical user interface that runs on top of a computer operating system. It is composed entirely of free and open source software...

 desktop environment

Desktop environment

In graphical computing, a desktop environment commonly refers to a style of graphical user interface derived from the desktop metaphor that is seen on most modern personal computers. These GUIs help the user in easily accessing, configuring, and modifying many important and frequently accessed...

. Gaphor uses a UML 2.0 compliant data model, can import classes from Python

Python (programming language)

Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python claims to "[combine] remarkable power with very clear syntax", and its standard library is large and comprehensive...

 source code and can export high quality graphic representations of the models.

Features

Gaphor supports class diagrams

Class diagram

In software engineering, a class diagram in the Unified Modeling Language is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations , and the relationships among the classes.- Overview :The class diagram is the main...

, use case diagrams

Use case diagram

A use case diagram in the Unified Modeling Language is a type of behavioral diagram defined by and created from a Use-case analysis. Its purpose is to present a graphical overview of the functionality provided by a system in terms of actors, their goals , and any dependencies between those use...

, action diagrams

Activity diagram

Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency. In the Unified Modeling Language, activity diagrams can be used to describe the business and operational step-by-step workflows of components in a system...

 and component diagrams

Component diagram

In the Unified Modeling Language, a component diagram depicts how components are wired together to form larger components and or software systems.They are used to illustrate the structure of arbitrarily complex systems.- Overview :...

. It can export high quality SVG or PDF diagrams. It also includes XMI export.

It has a plugin infrastructure to ease the addition of functionality.