Qttel is a Chinese voip provider providing free international calls from phone to phone.  Phone to phone free international calls mean that you’ll two phones to be able to make calls, or at least an incoming voip phone number (via Skype?)

Where Qttel offeres free international calls
50 destinations can be called to for completely free. Five destinations can be called from for free.
Australia (FIX only)
Canada (FIX & GSM!)
UK (FIX only)
Holland (FIX only)
USA (FIX & GSM!)

Thanks to the widget that Qttel uses, you can make calls right from this website!