Skype 5.0.0.7980 - Voice-over-internet phone and chat software.. (Free)

http://www.macupdate.com/app/mac/15805/skype?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+macupdate+%28MacUpdate+-+Mac+OS+X%29

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.
• Voicemail.