Google just announced that they’re extending free calling in Gmail through 2012 for both the US and Canada.The original plan for the Gmail tool was to have it run for free until the end of this year, but luckily for us Google has chosen to keep it free. Vincent Paquet posted on the Official Gmail Blog:

As the holiday season approaches, we’re happy to announce that we’ve extended free domestic calls within the US and Canada for 2012.

Gmail calling uses Google Voice technology to allow users to call any phone number in the US or Canada. It doesn’t attribute a specific phone number unless you tell it to use your Google Voice number.