Visual Paradigm for UML (VP-UML) is a powerful but easy-to-use UML modeling tool that supports full software life-cycle - analysis, design, implementation, testing and deployment. This UML CASE tool helps you build quality applications faster, better and cheaper. You can draw all types of UML diagrams, generate code from diagrams and vice versa, and generate documentation. This UML tool also provides plenty UML resources - UML tutorials, UML demos and UML sample projects.

VP-UML Features:
+The latest UML support
+OOAD support - object-oriented analysis (OOA), object-oriented design (OOD)
+CRC Card support
+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 XML, Dot NET dll/exe, C++, JDBC, Hibernate, Ada9x...
+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
+Auto-synchronization between code and diagrams
+Report generator - generate HTML/PDF report
+Automatic diagram layout - rearrange shapes and connectors
+Import XMI/export XMI
+Visio Integration - draw UML diagrams using stencils from MS Visio
+Export SVG, PNG, JPG
+More...

Other UML Modeling Tools / UML Plugins:
Windows Platform:
+SDE for Microsoft Visual Studio .NET

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