UML modeling Plugin for JDeveloper: UML notation support, code generation,...
BSEditor: SDE for JDeveloper is a UML CASE tool/plug-in tightly integrated with JDeveloper. This OO modeling tool supports full software development lifecycle - analysis, design, implementation, testing and deployment. This UML software helps you build quality applications FASTER, better and cheaper. You can draw all types of UML Diagrams in JDeveloper, 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, object diagram, class diagram, statechart/state diagram, activity diagram, component diagram, deployment diagram)
+Use case modelling (use case description, scheduling...)
+Textual analysis to identify candidate classes, use cases, actors, flow of events...
+Business Workflow diagram
+CRC Card for finding objects
+Reverse engineering - code to model, code to diagram (Java to UML models, Java to UML diagram)
+Instant Reverse for XML, XML Schema, Dot NET dll/exe, C++, CORBA IDL
+Code Generation - generate code, model to code, diagram 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 XMI/export XMI
+Import Rational Rose project
+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 (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
Windows Platform:
+SDE for Microsoft Visual Studio .NET
+More SDE... you can free download SDE for JDeveloper (SE) for Windows 1.1 Standard Edition now.