Skype 18.104.22.1684 - Voice-over-internet phone and chat software.. (Free): "
Skype allows you to talk to friends, family and co-workers across the internet without the inconvenience of long distance telephone charges. Using peer-to-peer technology for data transmission, Skype eliminates the central server as a middle manager.
Today, millions of individuals and businesses are taking advantage of Skype's diverse communication features:
- Free Skype-to-Skype calls.
- Call phones and mobiles, send SMS.
- Free instant messaging.
- Free video calls.
- Forward calls to a phone when you're offline.
- Updated contact list view
- New contact grid view
- Support for Mac OS X 10.7 Lion
- Minor improvements
- Support for HD video chat
Mac OS X 10.5.8 or later
(Via MacUpdate - Mac OS X.)