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 (Community Edition) for Windows 

Visual Paradigm for UML is an easy-to-use UML tool that supports reverse engineering for Java, XML, XML Schema, .NET dll/exe, C++, CORBA IDL, code generation, import Rational, XMI, report generator, MS Visio integration, version control, plugin, etc.
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SDE for JDeveloper (PE) for Windows 

SDE for JDeveloper is a UML plugin for JDeveloper. You can draw all types of UML diagrams (class, use case, sequence, collaboration, statechart, activity, component, deployment, object diagram) and perform textual analysis in JDeveloper...
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SDE for JBuilder (SE) for Windows 

SDE for JBuilder is a UML plug-in for JBuilder. SDE supports reverse engineering (Java code to UML model), code generation (UML model to Java code), import Rational Rose project, import/export XMI files, Microsoft Visio integration...
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SDE for JDeveloper (ME) for Linux 

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