UML CASE tool - UML diagrams, use case modeling, reverse engineering and more...
EditBy: Visual Paradigm for UML (VP-UML) is a powerful UML tool that supports full software life-cycle - analysis, design, implementation, testing and deployment. This 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. This UML CASE tool also provides plenty UML tutorials, UML demos and UML sample projects.

VP-UML Features:
+the latest UML support (use case diagram, class diagram, sequence diagram, collaboration diagram, state diagram, activity diagram, component diagram, deployment diagram)
+OOAD support - object-oriented analysis (OOA), object-oriented design (OOD)
+Textual analysis for identifying candidate actors, use cases, classes...
+CRC Card diagram
+Use case modeling (use case description, scheduling...)
+Business Workflow diagram
+Incremental round-trip engineering
+Code Generation - model to code, diagram to code (UML model to code, class diagram to Java)
+Reverse engineering - code to model, code to diagram (Java to UML models, Java to class diagram)
+Instant Reverse for Java, C++, XML Schema, XML, DotNET exe/dll, CORBA IDL
+Auto-synchronization Between source code and diagrams
+Report generator for generating documentation to HTML/PDF
+Automatic diagram layout - rearrange classes and connectors in UML diagrams in different styles
+Import XMI file/export XMI file
+Import Rational Rose project file
+Microsoft Visio Integration - UML diagramming with stencils from MS Visio
+Export diagrams to images (PNG, JPG, SVG)
+Plugin and template
+Version control
+Multilingual support
+More...

Other UML CASE 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
+More SDE... you can free download Visual Paradigm for UML (LE) for Windows 3.1 LE now.