Violet

Violet is a UML editor with these benefits:

• It is very easy to learn and use
• It draws nice-looking class, sequence, state, object and use-case diagrams
• It is completely free (includes source, distributed under the GNU General Public License)
• It is cross-platform

• Taylor - model driven architecture on rails
• ArgoUML - a UML design tool with cognitive support
• TinyUML
• StarUML - The Open Source UML/MDA Platform
• UniMod - Unified Modeling
• Fujaba Tool Suite
• Alma
• Quick Sequence Diagram Editor
• UMLGraph - Declarative Drawing of UML Diagrams
• UMLDot
• UMLet
• JUG - Java UML Generator