The Arturia iMini was just released in the Apple App store. The app is a recreation of the old school classic 1971 Minimoog synth. The iMini is based on the TAE technology which is also used in the Mini V Software. The app is also Tabletop Ready if you are interested incorporating the app in that. It works stand alone as well. Here is what they have to say.
The iMini not only recreates the look and feel of the most legendary synthesizer, it does it with unparalleled sound quality. iMini is based on the award winning Arturia Mini V software that was created in partnership with Dr. Robert Moog himself, back in 2003. Thanks to this heritage, continuous research and refinements over the years, iMini comes with amazing sound quality and a large collection of preset sounds created by top sound designers such as Klaus Schulze (Tangerine Dream) and Geoff Downes (Asia).