
TextUML Toolkit: a tool for creating UML 2.1 models using a textual notation ( EPL).TinyUML: open-source UML 2 diagramming tool implemented in Java, requiring Java SE 6 or later (licensed under the GNU GPL).Taylor: model-driven architecture "on rails" (licensed under the GNU LGPL).StarUML: an open-source UML/ MDA platform for Microsoft Windows, licensed under a modified version of GNU GPL, mostly written in Delphi.PlantUML: a open-source tool written in Java that uses simple textual descriptions to draw UML diagrams.Papyrus: an open source UML2 tool based on Eclipse and licensed under the EPL ( See also Topcased below.Open ModelSphere: open source UML modeling tool (licensed under the GNU GPL).
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NetBeans: available in NetBeans 6.0 full edition, or as a downloadable plugin in Plugin Manager, or with NetBeans IDE 5.5 Enterprise Pack.
BOUML AGGREGATION SOFTWARE
MOSKitt: UML Eclipse based tool for giving support to Model Driven based methodologies on Software Development Process.MonoUML: based on the latest Mono, GTK+ and ExpertCoder.MetricView Evolution: a tool for metrics-based quality-analysis and better comprehension of UML models.Various vectorial and bitmap output formats supported. MetaUML UML textual notation package implemented in MetaPost.jTracert is a Java agent which instruments applications running on the JVM and builds sequence diagrams.Jink UML: Easy to use UML Tool for Java (licensed under MIT).HOL-OCL: An interactive theorem proof environment for UML/OCL (licensed under the GNU GPL).Gaphor: a GTK+/ GNOME UML 2.0 modeling environment written in Python.Allows modeling behaviour using story diagrams. Fujaba: Acronym for "From UML to Java And Back Again".

PyUML: Graphical UML Editor plugin for Eclipse based on Eclipse UML2Tools that supports Python roundtrip, views and live validation.Eclipse Uml2Tools: GUI for the Eclipse UML2 Implementation with 5 diagram types.Eclipse: with Eclipse Modeling Framework (EMF) and UML 2.0 (meta model without GUI) projects.Dia: a GTK+/ GNOME diagramming tool that also supports UML (licensed under the GNU GPL).ClassBuilder: a C/C++ Uml modeling tool under zlib/libpng license.Very high performance (written in C++ with Qt).

Can generate C++/Java/IDL/PHP/Python and reverse engineer C++/Java/PHP.

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Can reverse engineer Java code (Plugins available for other languages, inc.
