Free Local and Long Distance Calling with netTALK’s DUO.
North America $70/year, International $120/year. This seems like a Skype competitor. It looks like there’s a piece of hardware that comes with this that can be seen here.
Here‘s how it works. You don’t need a computer — just plug the device into the router and phone. I noticed an HTC device trying to connect SIP to this outfit so they must have an Android app as well.