Get better calling service on your iPhone and turn your iPod Touch into a phone! Give your device two calling lines and a bunch of advanced calling feautres!
Apple isn't very keen on allowing 3rd party apps mimic or do essentially the same thing that is already natively done by the iPhone. Making phone calls seems like the most obvious native function of the iPhone, even though we all know it is definitely a better computer than it is a phone (*cough* thanks AT&T). An app called Line2 does exactly that with your iPhone - it makes calls using a clone interface of the iPhone's calling features. It makes calls so well that it can even place and receive them with your iPod touch thanks to VOIP.
Review by: David Prager