three开源的系统,1 Openbravo ERP,2 Joomla CMS,3 IRC mibbit

Openbravo ERP is a Web based ERP for SME, built on proven MVC & MDD framework that facilitate its customization. Already in production, Openbravo ERP encompasses a broad range of functionalities such as finance, supply chain, manufacturing & much more

http://sourceforge.net/projects/openbravo

一个开源的cms；哪个朋友有空可以测试一下。

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Joomla CMS

Joomla is an award-winning content management system (CMS), which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available. Best of all, Joomla is an open source solution that is freely available to everyone.

使用PHP语言加上MySQL数据库所开发的软件系统，可以在Linux、 Windows、MacOSX等各种不同的平台上执行

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3 IRC mibbit

o Java, no flash. With Mibbit, chatting online is easy, just choose your nickname and press go! No sign-up is required and you can use it from wherever you are with just a web browser.

Connect to IRC networks, IM, twitter, and more coming soon.

Mibbit has many customizable features which can help you make the most of your chat. You can change skins and use real-time language translation, image thumbnails, or even embed Youtube clips and exchange files with other Mibbit users.

一个感觉良好的在线聊天室。