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。

为了我的简单和简短的UML工作， 我用过这个工具:

星联 - http://staruml.sourceforge.net/en/

很棒的免费UML绘图软件。

虽然最初的Star UML不再维护，但是现在有一个叫做White Star UML的分支正在积极开发。

In my career I often needed to draw UML diagrams and generate Java code. I found MagicDraw most appealing and I'm a happy user. I think their licensing model is fair because it allows to pay for what you need. I prefer it to other products I used in my (distant) past: ArgoUML, Poseidon, Rational Rose, Dia. Be aware that my experiences on other products are obsolete and have maybe significantly improved or changed their licensing model. Maybe you should start with an open-source tool and decide later whether to spend some bucks.

使用MagicDraw，您可以通过从代码生成图表来记录您的代码。您也可以先建模，然后生成代码。它还可以很好地与多个ide集成。

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。

Rational和Together/J是最好的产品，但价格昂贵。

根据我的经验，我很喜欢Eclipse Omondo和Sparx Enterprise Architect。Omondo与Eclipse很好地集成了代码生成，并且有一种非常直观的感觉。然而，它与Java紧密相关。Sparx对于价格来说是一个很好的工具，但是缺少UML 2.0图的全部范围。

不要打扰波塞冬。它是错误的，臃肿的，并且在所有意图和目的上都不可用。

如果你想在不学习复杂的新工具的情况下就开始使用UML，我建议你去看看Violet UML。我曾经用它取得过很大的成功。