Skype is a program allowing telephone conversations via the Internet. Calls to other Skype users are free as well as calls to regular telephone and mobile telephone numbers all over the world are at a low rate.
You can read about the changes here.

Skype是一個小軟件，能讓您和世界上任何其它使用Skype的人免費通話。而且雖然通話是免費的，但通話質量卻是地地道道的一流水平。如果您和您的至親好友或生意上的關系戶都用網絡攝像頭，您還可以進行免費視頻通話。您甚至可以按確實便宜的每分鐘費率撥打普通和移動電話（免收開通費或月費）。

21.03.2007 version 3.1.0.147

* Known Issue: API: cannot set default video device
* Known Issue: API: app2app connection is not established if other party is not in your buddy list
* bugfix: API: OPEN CHAT command was not working
* bugfix: My pictures gave wrong error message when broken picture was used
* bugfix: Adding a png image as a profile image caused repeated error message
* bugfix: High CPU and an error message with double-byte languages when creating public chat

Download: Skype 3.1.0.147 (19.9 MB)