我用gmodeler.com。它只做类图。

好东西

非常简单的功能集。伟大的UI。非常容易使用。 有吸引力的UI。 不需要登录/创建帐户 可以保存图表 免费的

不好的事情

难以合作——必须导出到xml(我不在乎) 不能从任何机器访问图表，因为它保存到您的浏览器(我不在乎) 不能导出为图像或pdf(我可以截屏) 不能为大多数语言生成代码 非常简单的功能集。(我不在乎) 每个类都有一个“事件”列表，我不需要，我不能摆脱。

Sparx系统的Enterprise Architect是我用过的最好的工具。199美元(专业版)有点贵，但在我看来是值得的。

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。

看看BOUML:多平台(QT)，它工作得很好，支持协作工作。

BOUML是一个免费的UML 2工具箱(正在开发中)，允许您在c++、Java、Idl、Php和Python中指定和生成代码。 BOUML运行在Unix/Linux/Solaris, MacOS X(Power PC和Intel)和Windows下。

从维基百科:

4.23之前的版本是GPL许可的自由软件。BOUML 5及以上版本是专有软件。

一些背景:最近在研究生院，我为一个独立的项目研究了UML工具的可用性和UML理解。我还以当模特/建筑师为生。

之前的帖子有太多的答案而没有足够的问题。一个常见的误解是UML是关于创建图的。当然，图表很重要，但实际上您是在创建模型。以下是每个供应商的产品/解决方案在某些方面优于其他产品时应该回答的问题。注:列出的答案是我认为最好的，即使其他产品支持特定的功能或需求。

Are you modeling or drawing? (Drawing - ArgoUML, free implementations, and Visio) Will you be modeling in the future? (For basic modeling - Community editions of pay products) Do you want to formalize your modeling through profiles or meta-models? OCL? (Sparx, RSM, Visual Paradigm) Are you concerned about model portability, XMI support? (GenMyModel, Sparx, Visual Paradigm, Altova) Do you have an existing set of documents that you need to work with? (Depends on the documents) Would you want to generate code stubs or full functioning code?(GenMyModel, Visual Paradigm, Sparx, Altova) Do you need more mature processes such as use case management, pattern creation, asset creation, RUP integration, etc? (RSA/RSM/IBM Rational Products)

Detailed Examples: IBM Rational Software Architect did not implement UML 2.0 all the way when it comes to realizes type relationships when creating a UML profile, but Visual Paradigm and Sparx got it right. Ok, that was way too detailed, so a simpler example would be ArgoUML, which has no code generation features and focuses on drawing more than the modeling aspect of UML. Sparx and Visual Paradigm do UML really well and generate code well, however, hooking into project lifecycles and other process is where RSM/RSA is strong. Watch out for closed or product specific code generation processes or frameworks as you could end up stuck with that product.

这是一个直接的大脑转储，所以一些细节可能并不完美，但是，这应该提供了一个关于问题和解决方案的大致地图。

新-发现了一个很好的列表，许多UML工具的描述。Wiki UML工具列表

在我的实践中，我使用序列图编辑器。这是一个非常快速和有用的工具。我不喜欢它的一件事是它是商业产品，而不是免费的。