Is there an app for the iPod that lets you call somebody from a number that you choose?

I don't know if you meant iphone or iPod. I'm not aware of an application that enables calls from the iPod. However, there is an application for the iphone that allows you to punch in the number you'd like the person your calling to see. Example... my name is Jen, so I sometimes call my friends from 867.5309... 80's song Jenny...