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

Feature List:
+Support UML version 2.1
+Business Workflow diagram - Process, Decision, Business Actor, Document
+Reverse engineering of ERD from DDL (New Feature)
+Incorporate images into documentation(New Feature)
+Generate Hibernate annotations in ORM persistence (New Feature)
+Java Roundtrip engineering
+Reverse engineering Java, C++, XML Schema, XML, .NET exe/dll, CORBA IDL (Enhanced)
+Code Generation - model to code, diagram to code (Enhanced to support Ada95 and Flash Actionscript 3.0)
+Use Case Details Editor - An all-in-one environment for specifying a use case's details including general model specification and use case descriptions
+EJB Diagram - Visualize EJB systems
+EJB Code Generation
+Data flow diagram
+ORM support - generate Java objects from database
+Database generation - ERD to database tables
+Database reverse - existing DBMS to ERD
+Modeling collaboratively with CVS and Subversion
+Report generator for generating documentation
+Automatic diagram layout
+Import/export XMI file
+Export diagrams to JPG, PNG, SVG, EMF, PDF
+Visio Integration - draw UML diagrams with Visio stencils
+Shape editor
+More...

Other UML modeling Tools/UML Plugins:
Java Platform (Windows/Linux/Mac OS X):
+SDE for Eclipse
+SDE for NetBeans
+SDE for Sun ONE
+SDE for Oracle JDeveloper
+SDE for JBuilder
+SDE for IntelliJ IDEA
+SDE for WebLogic Workshop

Windows Platform:
+SDE for Microsoft Visual Studio
+More SDE...