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.
GizmoCall.comUse Gizmo5 for free calls with Google Voice | jRin.net
Learn how to use Gizmo 5 and Google Voice to easily make and receive free calls (pair with an ATA device, and be able to call using your home's land line!)
Use Gizmo5 for free calls with Google Voice