DM1 The Drum Machine ($4.99 on the App Store) is a beautiful looking drum machine app for the iPad. I'm not a drummer at all and it's for that reason that this app is very appealing to me.

DM1 Drum Machine for the iPad
DM1 is an advanced vintage Drum Machine. It turns your iPad into a fun and creative beat making machine. Easy and fast to use, loaded with 64 superb electronic drum kits and beautiful hyper-realistic graphics,
 DM1 has been designed for a lot of instant fun.

Via beautifulpixels.com

DM1 - The Drum Machine - Fingerlab

DM1 Drum Machine for the iPad