Skype公司发布了一款软件，能够使用户通过网络进行视频和音频电话、即时聊天和文件传输。在软件首发后的六周内，就有150万用户下载了该软件。

Within the first six weeks of its initial release, 1.5 million users had downloaded the software, which allows video and voice calls, instant messages and file transfers to be made over the Internet.

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也可以用它们传输即时压缩的内容流，例如现场直播。

You can use them with a content stream that's compressed on-the-fly, for example in a live-event broadcast.

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Lotus Instant Messaging(即时消息，原来的Sametime)现在也支持Session Initiation Protocol(会话发起协议，SIP)，在已有的通信方法上增加了一种传输机制。

Lotus Instant Messaging (formerly Sametime) now supports Session Initiation Protocol (SIP) as a transport mechanism in addition to its proprietary communication method.

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