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。

你应该试试Creately。在浏览器中运行，可以进行团队协作。

支持序列图，类，ER，用例等工作很棒，并有一个免费版本可用。

Creately.com

我不敢相信没有人提到NetBeans UML编辑器，它很棒，满足了我所有基于Java的UML需求。

这是在我测试了JDeveloper UML, ArgoUML和StarUML之后。

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。

我喜欢前面提到的VisualParadigm。它功能强大，易于使用，我认为它比其他工具更强大。

如果你需要一些简单、快速、简单(而且免费)的东西，有一个很好的工具叫UMLet——我强烈推荐这个。我已经尝试了许多UML图表工具，这是最简单的一个(它仍然允许做很好的图表)。这是我的选择:)

你可能正在寻找一个自动工具，它会自动为你生成很多东西。但是这里有一个免费的、功能强大的图表绘制工具，它不仅对UML有用，而且对各种图表绘制任务都有用。它接受各种常用文件格式作为输入和输出。它叫yEd，值得一看