Gizmo Client 3.0 talks to most IM clients,

VoIP IP Telephony @ http://snapvoip.blogspot.com
One of my favorite VoIP clients, Gizmo Project has released a new client, version 3.0.
With the new client, Gizmo project brings you;
Drum roll.................
# It’s FREE!
# FREE call's to any GizmoProject, Yahoo! Messenger, Google Talk, or Windows Live user
# Free Voicemail and Conference calling.
# Super clear call quality
# Inexpensive add-ons that let you make and receive calls from any mobile phone or landline
So if you are wondering where my Skype Credits went (It is connection fee you **&%%*)
it is time you at least try this out. In addition Gizmo client, one also could use Gizmocall;
VOIP IP Telephony: Use Gizmocall to call me or anyone free
to complete a call when the client is not handy at your hands.
Gizmo is available for Windows, MAC and Linux as well as for Nokia N800, N80 and Nokia 770. Follow the links for downloads.

links;
Gizmo Project
Gizmocall