1. My favourite is procreate, it's made for multitouch ipad only and has lots of innovative features and a cool brush engine. Combined with an Adonit Jot touch 4 (guess not compatible with ipad 2) it's real fun and receives serious updates time by time. Export to i.e. psd is possible via email or dropbox. 2. Sketch Club…
For painting: Procreate by FAR. And, no not really. Nothing I've ever done on the iPad has REALLY contributed toward development further than as rough concept art, and I've been painting on it since the iPad 1 launched. So far as music? It's more capable, especially when you plug in a midi keyboard but again, it only…