The whole world can talk for free

Do you know "SKYPE"software to make free phone calls to anywhere on the earth? If you downloaded this free software on your computer, you can make free phone calls to other SKYPE users. If we want to make a call to ordinary phone, they will charge us very low prices. For example, a call from Canada to Japan costs 2.7cents per minute, from Japan to Canada 2.38yen per minite. There are no contract fees or any other fees. I will try to use SKYPE this weekend.
http://www.skype.com/
http://www.skype.com/intl/ja/ <- Japanese