AudioKit Pro has released a completely free multi-sampled DX7-inspired instrument app and are also releasing free code that will allow anyone to make their own iOS app out of EXS24, Sound Font, and Wave libraries. They tell us that FM Player has over 50+ sounds and is multi-sampled from a DX7, a DX7II, and some bonus TX81z presets.
Pricing and Availability:
Free at the app store.
The first standalone semi-modular from Pittsburgh Modular