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Bouml a free UML 2 modeler for Windows, Linux and MacOS X

bruno pages
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BOUML is a recent free UML toolbox (GPL license) for Windows, Linux and MacOS X, written in C++ on Qt.

BOUML is very fast and doesn't need a large memory size (see benchmark), a Java reverse of all the JDK sources is not a problem for it !

BOUML is composed of the modeller itself, and a list of external programs (called plug-out) being able to be written in C++ or Java (not in Visual Basic !). Any user can write a plug-out to extend the modeler features, the API provided carrying out the needed exchanges with the modeller. A plug-out is made using BOUML like any other program.

The main plug-outs contained in BOUML are currently :
  • C++, Java and IDL generators
  • C++ and Java reverse
  • Roundtrip body, to update bodies in the model from their definition in source file, when you ask for write them out of Bouml
  • Project control and Project synchro, for multi-user modeling management
  • Plug-out upgrade, to upgrade a plug-out with the new API features
  • Java catalog, to easily add to the model classes coming from the JDK or another library, may be personal
  • HTML documentation generator, this one is given as example of a project simultaneously producing a definition in C++ and Java
  • Rose project import, except diagram in the current version
  • state machine generator
  • XMI 1.2 and 2.1 generators
  • XMI 2.1 import
  • File control, to manage project files through Clearcase, CVS, subversion or other file controler
  • pro file generator, these files are used by qmake to produce Makefile

  • BOUML and its documentation are available on

    Happy modeling !
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