Skype              

Skype is software that enables you to make free calls anywhere in the U.S.A.  You can also call people internationally for a small fee.  Absolutely no set-up fee's unless you want to make call's internationally. International calls are 99% cheaper than a regular telephone service.  Skype uses innovative P2P (peer-to-peer) technology to connect you with other users. It offers several features, including SkypeOut calling from Skype to regular and mobile phones worldwide, conference calling, and secure file transferring. Skype calls have better sound quality than your regular phone and are highly secure, with end-to-end encryption.

Version 3 is easier to use, has more powerful and personal interface, and connects with the world on Skype Public Chats.