People who use Gmail to make phone calls in North America will be able to do so free for another year.
Google said in a blog post today that it was extending free domestic calling through 2013. It also touted its low rates for international calls.
Launched in the summer of 2010 as an alternative to Skype, Google's calling plugin lets people make calls to any mobile phone or landline via the Chat section in Gmail. The service is available for a slew of countries (there's a list here, under "show all rates").