spark:Cross-platform real-time collaboration client optimized for business and organizations.Spark is a full-features instant messaging (IM) and groupchat client that uses the XMPP protocol.

下载地址:http://www.igniterealtime.org/downloads/index.jsp

Spark也有一个web版，叫spark web。

安装Spark后运行：

填写用户名和密码，如果在本机运行服务器就写127.0.0.1就行了 。

即时通信Spark安装和配置