Skype

Try Skype if you want to test free phone over the Internet. Skype uses P2P (peer-to-peer) technology to connect you to other users – not to share files this time, but to talk and chat with your friends.

"I received your letter of June 10th. I have never talked to a Jesuit priest in my life and I am astonished by the audacity to tell such lies about me. From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist." [Albert Einstein to Guy H. Raner Jr, July 2, 1945, responding to a rumor that a Jesuit priest had caused Einstein to convert from atheism. Article by Michael R. Gilmore in Skeptic magazine, Vol. 5, No. 2, 1997]