I've talked about Audio MIDI Connect in the past, but this guy does a much better job of showing you how useful this is. Replace $100 hardware with a $5 app! This is going to be amazing with the new update adding Virtual MIDI and background support.
Secret Base Design sent me over 6 promo-codes to give away! For a chance to win one all you need to do is retweet this story, winners will be announced tomorrow evening. Please, make sure you're following me so that I can DM you the codes privately!