Visual Paradigm for UML (VP-UML) is a superior UML tool that supports full software lifecycle - analysis, design, construction, testing and deployment. The UML modeling software helps you build quality applications faster, better and cheaper. You can draw all types of UML diagrams, reverse code, generate code from diagrams and generate documentation. The UML CASE tool also provides plenty UML tutorials, UML demonstrations and UML projects.

Feature List:
+The latest UML support
+OO analysis (OOA), OO design (OOD) support
+CRC (Class-Responsibility-Collaborator) Card diagram
+Business Workflow diagram
+Incremental round-trip engineering
+Code Generation - model to code, diagram to code
+Reverse engineering - code to model, code to diagram
+Instant Reverse for Java, C++, XML Schema, XML, DotNET exe/dll, CORBA IDL
+Auto-synchronization between source code and diagrams
+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.
+ORM support - generate Java objects from database
+Database generation - ERD to database tables
+Database reverse - existing DBMS to ERD
+PDF/HTML Report generator
+Automatic diagram layout - rearrange shapes and connectors in diagrams
+Import XMI file /export XMI file
+Import Rational Rose project file
+Microsoft Visio Integration - draw UML diagrams with stencils from MS Visio
+Version control
+More...

Other UML modelling Tools / UML Plugins:
Windows Platform:
+SDE for MS Visual Studio .NET

Java Platform (Windows/Linux/Mac OS X):
+SDE for Oracle JDeveloper
+SDE for IBM WebSphere
+SDE for JBuilder
+SDE for IntelliJ IDEA
+SDE for Eclipse
+SDE for NetBeans
+SDE for Sun ONE
+SDE for WebLogic Workshop
+More SDE...