Free calls to USA and CANADA using icall

iCall can be used to make free internet phone calls. With iCall, you can make free calls from PC to phone using their free software. The computer that you make calls from can be anywhere in the world but for the call to be free, the number you call must be in the United States or Canada. 

iCall is available as a free desktop application for Windows, Mac OS X, or Linux and as a free iPhone app. Free phone calls will be disconnected after a short five minutes but you can call the number back again as many times as you want. You will also hear an advertisement before each call that's around ten seconds long.

A flash-based version of iCall is also available on their website but free calls here are limited to three minutes.

Take advantage of googletalk's free calls to USA and Canada throughout 2011

Gmail calling works like a regular phone, but through your email account. You simply select a contact or dial a number, and start talking to the recipient. The free service was originally intended to be cut off at the end of this year, but Google has offered to extend Gmail calling until December 31, 11:59pm 2011.

Gmail calling doesn't just do voice, but it also allows you to video chat with supported webcams and cell phones. Gmail calling also does international phone calls too, for as little as $0.02 a minute.

If you haven't tried Gmail calling yet, give it a try by logging into your Gmail account and selecting "Call phone" on the left hand side. You can also get the desktop client for Windows, Mac and Linux for free here.