Skype Is the network voice communication tool. It can free high-definition voice conversations with other users, you can also call the domestic and international calls, but also have other functions required by IM, such as file transfer, text chat etc.. You do not need to perform complex firewall Or routing settings, you can smoothly install easy to use.
Skype is a small software free call, any use of Skype people in the world are free calls, call quality is first-class level of genuine. If the relationship between you and your close relatives and good friends or business with network camera, you can also make free video calls. You can even by really cheap per minute rates for ordinary dial and mobile phone (free subscription fee or monthly fee).