Now Poseidon for UML is based on our Poseidon for DSLs platform.
Creates activity diagrams, class and object diagrams and communication diagrams.
No Magic Inc.
Facilitates analysis and design of Object Oriented (OO) systems and databases.
Visual Paradigm International Ltd.
VP-UML Community Edition (VP-UML CE) is a free UML drawing tool.
A powerful yet easy-to-use UML diagram drawing program.
Faculty of Management Science and Informatics, University of Zilina
It's aimed towards diagram types commonly used by people involved in IT.
Create visual representation of processes, organization, mind map, etc.
Diagram Designer is a graphics editor tool to edit graphical data.
Diagram Ring is an open source advanced diagram editor.
The UML stencil for Visio supports complete UML, SoaML and other UML profiles.
Green Bird Software
A small program to draw class diagrams and generate code.
Umbrello UML Modeller is a Unified Modelling Language (UML) diagram program.
Change Vison, Inc.
It lets you draw UML, ER, Flowchart, CRUD, Data Flow Diagram.
Adrian & Frank Buehlmann
Fast and Lightweight UML Diagram Editor for Windows 2000, XP and Vista.
Digitron Software Ltd
Create UML Class Diagrams with automatic layout, requiring no manual positioning.
Create UML class diagrams with full C# and Java language.
Ivar Jacobson International
Allows you to create UML use cases and class models.
Enables the bi-directional conversion of UML Class Models and Data Models.
Aspose.Diagram is a class library for working with Microsoft Visio files.