Make Free VoIP Calls from Google Voice - Google Voice - Lifehacker

Make Free VoIP Calls from Google Voice - Google Voice - Lifehacker: "Google Voice is great, but it isn't an entirely free voice-over-internet service if you have to pay a phone bill to use it. With a few tweaks, though, you can talk to anyone on-the-cheap through Skype, or entirely for free with Gizmo."