Retronyms' Tabletop is currently free on the App Store. The built-in synths and samplers feel very comfortable in terms of utilizing the iPad screen size and processing power. Tabletop's development team is also in charge of the upcoming Akai MPC Fly app, so take a good look at the amount of polish and usability that this team puts into its software.
Size: 219 MB
Updated: April 18, 2012