SDE for IBM WebSphere (CE) for Mac OS X 

SDE for IBM WebSphere is a UML modelling tool tightly integrated with IBM WebSphere. You can draw all types of UML diagrams (class, use case, sequence, collaboration, state chart, activity, component, deployment, object diagram) in IBM WebSphere...
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Visual Paradigm for UML (Community Edition) for Mac OS X 

Visual Paradigm for UML is a full life-cycle UML CASE tool that supports the latest UML notation (class diagram, use case diagram, sequence diagram, communication diagram, statechart diagram, activity diagram, component diagram, deployment diagram).
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Visual Paradigm for UML (Professional Edition) for Mac OS X 

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

Visual Paradigm for UML is a platform-independent UML tool that runs on Windows, Linux, Mac OS X. VP-UML supports all UML diagrams, reverse engineering (Java, C++, XML, CORBA IDL, DotNET dll...), code generation, import Rational Rose, plugin, etc.
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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.
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SDE for Sun ONE (SE) for Mac OS X 

SDE for Sun ONE is a UML plug-in for Sun ONE. You can draw all types of UML diagrams (class, use case, sequence, component ...) in Sun ONE, generate Java code, reverse engineer Java code to class diagram, import Rational Rose...
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