UML CASE tool - UML diagrams, use case modeling, reverse engineering and more...
Edit By BS Editor: Visual Paradigm for UML is a professional but user-friendly UML modeling tool that supports complete software lifecycle - analysis, design, construction, testing and deployment. The UML CASE 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 tool also provides abundant UML resources including UML tutorials, UML interactive demonstrations and UML projects.

Feature List:
+the latest UML support (class diagram, use case diagram, sequence diagram, collaboration diagram, state diagram, activity diagram, component diagram, deployment diagram)
+Use case modeling (use case description, scheduling...)
+Textual analysis for identifying candidate classes, use cases, flow of events...
+CRC (Class-Responsibility-Collaborator) Card
+Business Workflow diagram - Process, Decision, Business Actor, Document
+Object-oriented analysis (OOA), object-oriented design (OOD) support
+Incremental roundtrip engineering
+Reverse engineering - code to model, code to diagram (Java to UML models, Java to UML diagram)
+Reverse engineering XML, Dot NET dll/exe, C++, CORBA IDL
+Code Generation - model to code, diagram to code (UML to code, UML model to Java)
+Auto-sync Between source code and diagrams
+Report generator for generating documentation
+Automatic diagram layout - arrange classes and connectors in UML diagrams in different styles
+Import/export XMI
+Import Rational Rose
+Microsoft Visio Integration - drawing UML diagrams with MS Visio stencils
+Export diagrams to SVG, PNG, JPG
+Plugin and template
+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 IBM WebSphere (WSAD)
+SDE for Borland JBuilder
+SDE for IntelliJ IDEA
Windows Platform:
+SDE for MS Visual Studio .NET
+More SDE... you can free download Visual Paradigm for UML (PE) for Java 3.1 now.