You can't get apps for an iPod nano :(
find my iphone
You can't. Itunes will not allow you to do so because it is against the law.Actually you can so long as you and the other person you want to swap with have the Bump application which allows you to...
Once you delete an app, it is permanently gone from the iPod. Since it is no longer on your iPod, you have to re-download it from the App Store.
i don't think that you can transfer apps with bump also bump is for the iPhone to transfer eachothers phone number and isn't made for the iPod