看看Sybase PowerDesigner

http://www.sybase.com/products/modelingdevelopment/powerdesigner

描述:

http://en.wikipedia.org/wiki/PowerDesigner

这是一个非常强大的工具，但价格也是如此!

我推荐Software Ideas Modeler。它有很多功能和直观的GUI。

我强烈推荐BOUML。它是一个免费的UML建模应用程序，它:

is extremely fast (fastest UML tool ever created, check out benchmarks), has rock solid C++, Java, PHP and others import support, is multiplatform (Linux, Windows, other OSes), has a great SVG export support, which is important, because viewing large graphs in vector format, which scales fast in e.g. Firefox, is very convenient (you can quickly switch between "birds eye" view and class detail view), is full featured, impressively intensively developed (look at development history, it's hard to believe that such fast progress is possible). supports plugins, has modular architecture (this allows user contributions, looks like BOUML community is forming up)

相信我，没有更好的工具了。与BOUML相比，StarUML是一个弱智的海龟。ArgoUML根本不起作用。Dia是一个人机工程学^-1软件。

http://plantuml.sourceforge.net/index.html

我从1999年就开始研究UML标准，我可以告诉你Sparx Enterprise Architect不应该被认为是UML工具，因为它不符合UML 2规范。它的图表看起来像UML，但是属性的名称和它们指定的方式不遵循UML标准。MagicDraw和IBM RSA是目前市场上真正的UML工具。

PlantUML是一个开源的Java标记语言到uml图工具，这里值得一提。它在可用性方面排名很高，因为它对各种图表和图表组件的语法很直观。