Two free apps announced today increase your options for making low-cost calls via your iPhone or iPod touch. goober VoIP is like Skype in that it can use the data capability of your iPhone via WiFi or 3G to make telephone calls. But the rate is 1 cent per minute compared to Skype's 2.1 cents per minute for calls in the U.S. and Canada. International calls are around 1.4 cents per minute. The first two minutes of any call are free, and you get 100 free minutes when you first sign up.