Skype
4.0.0.227 Final 多国语言绿色免费版
Skype is a small piece of software that allows you to make free calls to anyone else in the world who uses Skype. And although the calls are free, the call quality is truly top-notch. If you and your closest friends, family or business connections all use webcams, you can also make free video calls. You can even make regular and mobile phone calls at really cheap per-minute rates (with no setup or monthly fees).