Talkster: call via Skype and Google Talk

Talkster is a free service for domestic and international phone calls via the Internet.The service uses Google Talk, the famous VoIP software from Google, and Skype.

To make calls you must first be assigned a number Talkster, then insert the name and telephone number of the person to call, and associate with this contact the Talkster number that is assigned.
We can save this phone number in the phone book and use it whenever you want to call.

For use with GTalk follow these instructions.

The service offered by Talkster is free, but the phones, local phone call from our phone company in accordance with the rates provided.

Site: www.talkster.com