Visual Paradigm for UML is a user-friendly, complete-featured UML modelling tool that supports complete software development lifecycle - analysis, design, construction, testing and deployment. The UML modeling tool helps you build quality applications faster, better and at lower cost. You can draw all types of UML diagrams, reverse source code, generate code from class diagrams and generate documentation. The UML CASE tool also provides plenty UML resources including UML tutorials, UML projects and UML interactive demonstrations.

Feature List:
+Complete UML notation support
+OO analysis (OOA), OO design (OOD) support
+Business Workflow diagram
+Incremental roundtrip engineering
+Reverse engineering - code to diagram, code to model
+Use Case Details Editor - An all-in-one environment for specifying a use case's details including general model specification and use case descriptions
+Full Screen Diagram Editing - Maximizes the diagramming area
+Sweeper - Drag to sweep shapes aside to make room for creating new shapes.
+EJB Diagram - Visualize EJB systems.
+EJB Code Generation and Deployment - Generate beans for your application development and deployment.
+Database reverse - database to ERD
+Database generation - ERD to database tables
+ORM support - Generate Java objects correspond to a database
+Reverse engineering XML, DotNET dll/exe, C++, CORBA IDL...
+Code Generation - diagram to code, model to code
+Sync between diagram and source code
+Report generator for generating documentation
+Auto diagram layout - arrange classes and connectors in different styles +Import/export XMI
+Import Rational Rose file
+Visio Integration - draw UML diagrams with Visio stencils
+Version control
+More...

Other UML Tools / UML Plug-ins:
Java Platform (Mac OS X/Windows/Linux):
+SDE for Eclipse
+SDE for NetBeans
+SDE for Sun ONE
+SDE for Oracle JDeveloper
+SDE for IBM WebSphere (WSAD)
+SDE for Borland JBuilder
+SDE for IntelliJ IDEA
+SDE for WebLogic Workshop

Windows Platform:
+SDE for MS Visual Studio .NET
+More SDE...3