Another Skype wannabe: Gizmo: A free phone for your computer:
Gizmo is a Free Phone for Your Computer
That makes calling as easy as instant messaging
An internet telephone. As simple as an instant messenger. Now you’re talking.
Make all your calls from the comfort of your desktop. With Gizmo, it’s point, click, talk. For free.
Say goodbye to high price calling, and say “hello” to anyone online, anywhere on earth.
Works on Macs, Windows and Linux.
It’s not “just another” Skype wannabe – it tries hard to copy what it can but it has the advantage that it works with SIP which means (unlike Skype) that people using all kinds of different Voice over IP services should be able to talk to their users. I am however more interested in http://jajah.com/en/index.asp which communicates with Skype as well as SIP phones, has text message support and videoconferencing etc. I am waiting for it to become available on Mac though.
does gizmo allow free call to mobile phones ^^,