Image courtesy of SkypeMost people who know of and use Skype use it's free video and voice chat that works across the Internet between two devices running Skype. However, you can also use Skype to make calls to any phone number at low rates using Skype Credit, and you can even buy a phone number to receive phone calls in Skype. The Skype app essentially turns an iPod Touch into a phone as long as it is connected to WiFi.

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