Visual Paradigm for UML (Personal Edition) for Linux 

Visual Paradigm for UML is a cross-platform UML modeling tool that runs on Windows, Linux, Mac OS X. VP-UML supports all UML diagrams, reverse engineering (code to model), code generation (models to code), import Rational, MS Visio integration, etc.
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Visual Paradigm for UML (Personal Edition) for Mac OS X 

Visual Paradigm for UML is a UML modelling tool that supports full software lifecycle - OO analysis, OO design, coding, testing and deployment. VP-UML supports round-trip, reverse engineering, code generation, import XMI, Rational Rose, plugin, etc.
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Visual Paradigm for UML (Modeler Edition) for Windows 

Visual Paradigm for UML is an easy-to-use UML CASE tool supporting all UML diagrams - class diagram, use case diagram, sequence diagram, communication diagram, state diagram, activity diagram, component diagram, deployment diagram, object, package.
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SDE for Sun ONE (ME) for Linux 

SDE for Sun ONE is a UML modeling tool tightly integrated with Sun ONE. You can draw all types of UML diagrams (use case, class...) in Sun ONE, reverse engineer Java code to class diagram, generate Java code, import Rational Rose...
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SDE for Sun ONE (ME) for Mac OS X 

SDE for Sun ONE is a UML modeling tool tightly integrated with Sun ONE. You can capture requirements, draw all types of UML diagrams, reverse engineer Java to UML model, generate Java code and generate UML documents in HTML/PDF format...
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SDE for Sun ONE (ME) for Windows 

SDE for Sun ONE is a UML modeling tool tightly integrated with Sun ONE. SDE supports reverse engineering (Java code to UML model), code generation (UML model to Java code), Microsoft Visio integration, import Rational Rose project...
sun one uml modeler add-ins plugins uml 2.0 uml tools modelling tools uml diagrams case tools class diagrams use cases rational rose