Skype and Jajah let you make long distance calls for free or low cost.
My friend Dan King introduced me to SKYPE. He had friends in the UK and wanted to call them from Canada but without the ridiculous long distance charges the local phone company would charge. The critical difference with Skype was a service they offer which allows you to make calls to conventional phones. It is called SkypeOut, and it costs about $0.03 cents CAD per minute. Definately a better price than the one offered by local phone companies.
The Skype website says:
“Skype is a little piece of software that lets you talk over the Internet to anyone in the world for free.”
SkypeIn is a phone number your friends can call. You answer in Skype.
Use SkypeOut to call from Skype to traditional landlines or mobiles.