Yes ! you can make free phone calls from PC to phone ( any where in the world ).This is the feature that is provided by Evaphone. This site offers you to make phone calls any where to the world but only for two minutes a day.It recognizes your IP address and then allow only a couple of minutes to talk.If you want to talk for more time , then you will need to pay for it.
     But the trick i have for it is , change your ip address after you make a phone call and then talk as much as you wish , once your call is completed then change your IP address , by Obtaining IP address automatically rather than getting a fixed IP address.
           Post regarding the changing of IP address will be posted with in a short time.