UML CASE tool for IntelliJ IDEA: An object-oriented software development tool...
Editor: SDE for IntelliJ IDEA is a UML CASE tool/plug-in tightly integrated with IntelliJ IDEA. This UML modeling software supports full software development lifecycle - 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 in IntelliJ IDEA, generate Java code, reverse engineer Java code to class diagrams and generate documentation.

SDE Features:
+the latest UML support (use case diagram, sequence diagram, collaboration diagram, class diagram, statechart/state diagram, activity diagram, component diagram, deployment diagram, object diagram, package diagram)
+CRC Card for finding objects
+Use case modelling (use case description, scheduling...)
+Textual analysis to identify candidate classes, use cases, actors, flow of events...
+Business Workflow diagram
+Reverse engineering - code to model, code to diagram (Java to UML models, Java to UML diagram)
+Instant Reverse for Java, C++, XML, XML Schema, CORBA IDL, Dot NET dll/exe
+Code Generation - generate code, diagram to code, model to code (UML to code, UML model to Java)
+Incremental round-trip engineering
+Automatic synchronization Between source code and diagrams
+Plugin and template
+Automatic diagram layout - rearrange shapes and connectors on diagrams in elegant styles
+Import Rational Rose project
+Export XMI/Import XMI
+Export diagrams to SVG, PNG, JPG
+Visio Integration - draw UML diagrams with MS Visio stencils
+Report generator for generating UML documentation to HTML or PDF
+Version control
+Multilingual support
+More...

Other UML Modeling Tools / UML Plugins:
Java Platform (Mac OS X/Windows/Linux):
+SDE for IntelliJ IDEA
+SDE for Eclipse
+SDE for Oracle JDeveloper
+SDE for IBM WebSphere (WSAD)
+SDE for Borland JBuilder
+SDE for NetBeans
+SDE for Sun ONE
Windows Platform:
+SDE for Microsoft Visual Studio .NET
+aMore SDE... you can free download SDE for IntelliJ IDEA (PE) for Java 1.1 Professional now.