Google Voice

Google Voice is the very best way to make free Internet phone calls. With Google Voice, you can make free phone calls, free PC to phone calls (via Google Talk browser plugin), and free PC to PC calls (also via Google Talk).

Google Voice is much more than a way to make free phone calls on the Internet. Google Voice is primarily a way to manage the phone numbers in your life and can be used to intelligently route incoming calls to your free phone number provided by Google Voice to any other phone you have. With Google Voice, you can also get free SMS, make a free conference call, and get free voice mail services.

Free calls you make with Google Voice must be to numbers in Canada or the United States .

Google Voice is available as a web application that you can use in any browser, including mobile browsers Dedicated applications are available for BlackBerry and Android users and a few unofficial applications are available for iPhone users.

Free phone calls with Google Voice are limited to 3 hours. However, you can continue to make a free call to the same number over again and over again.

For more info, please visit this page : http://www.google.com/googlevoice/about.html