Visual Paradigm for UML (Personal Edition) for Windows 

Visual Paradigm for UML is a powerful but easy-to-use UML tool. VP-UML supports round-trip engineering, reverse engineering, real-time code generation, import Rational, export/import XMI, report generator, Microsoft Visio integration, plugin, etc.
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Visual Paradigm for UML (Modeler Edition) for Mac OS X 

Visual Paradigm for UML is a powerful but easy-to-use UML tool. VP-UML supports reverse engineering for Java, XML, Dot NET dll/exe, C++, CORBA IDL, code generation, import Rational, XMI, report generator, Microsoft Visio integration, plugin, etc.
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Visual Paradigm for UML (Modeler Edition) for Linux 

Visual Paradigm for UML is a powerful but easy-to-use UML modeling tool supporting real-time synchronization between code and model, import Rational Rose, export/import XMI, report generator, MS Visio integration, plugins, version control, etc.
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Visual Paradigm for UML (Modeler Edition) for Java Platform 

Visual Paradigm for UML is a powerful UML CASE tool that runs on the most popular IDE including Visual Studio .NET, IntelliJ IDEA, Eclipse, NetBeans, Sun ONE, JBuilder, IBM WebSphere,etc. +reverse engineering +code generation +import Rational, XMI...
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Visual Paradigm for UML (Standard Edition) for Windows 

Visual Paradigm for UML is an easy-to-use UML tool that supports reverse engineering (code to model), code generation (models to code), import Rational Rose, export/import XMI, report generator, MS Visio integration, version control, plug-in, etc.
uml uml 2.0 uml tools modelling tools uml diagrams case tools class diagrams use cases rational rose object oriented oo ood

Visual Paradigm for UML (Standard Edition) for Mac OS X 

Visual Paradigm for UML is an easy-to-use UML modeling software that supports OOAD (OOA, OOD). VP-UML supports round-trip, reverse engineering, real-time code generation, import Rational Rose, XMI, report generator, MS Visio integration, plugin, etc.
uml uml 2.0 uml tools modelling tools uml diagrams case tools class diagrams use cases rational rose object oriented oo ood