A fast and feature rich free UML tool supports all UML diagrams. Visual Paradigm for UML Community Edition supports use case diagram, class diagram, object diagram, sequence diagram, activity diagram, state machine diagram and package diagram.

Version: 8.0Visual Paradigm for UML Community Edition (VP-UML CE) is full feature UML modeling tool plus ERD support. VP-UML CE supports all latest UML version notations. VP-UML CE is free for non-commercial use.
License: Free
Operating System: Windows
Homepage: www.visual-paradigm.com
Developed by:
VP-UML CE is design for who need to learn UML. VP-UML CE is zero learning curve modeling tool. Modeler can familiar with all modeling features within 10 minutes.
Selected Features:
- Support UML 2.x
- Class Diagram
- Use Case Diagram
- Sequence Diagram
- Communication Diagram
- State Machine Diagram
- Activity Diagram
- Component Diagram
- Deployment Diagram
- and more
- Requirement Diagram
- Drawing Entity Relationship Diagram
- Better annotation for sequence diagram (New)
- Unique resource
- centric interface
- Callout and Freehand shape
- Automatic diagram layout and reroute connector
- Support line jump in Arc, Square, Skip or normal
- Align Connector Caption Base on Connector Orientation
What's New
Version 8.0: UML Diagrams
Version 7.2: entity completion, split diagram