Skype is free calls and instant messages. And you can call landlines and mobiles anywhere in the world at great rates. Skype is free to download and easy to use.
* Free Skype-to-Skype calls
With Skype on your iPhone or iPod touch, simply sign into Skype from any WiFi zone, and call friends and family on Skype totally free.
* See who’s online and instant message them
Sign into Skype via 3G, Edge, GPRS or WiFi and check who’s online - then instant message them whenever and wherever the mood strikes.
Skype website http://www.skype.com