"Zeeon is a virtual analog synthesizer, powered by an advanced analog circuit modelling engine. We spent a lot of time analysing iconic analog synths, both vintage and modern, to find out which parts of the circuit contribute most to their specific character. We used this knowledge to create a unique synth, with focus on what’s most important - the pure, organic and detailed sound... All audio and modulation signals are processed at 176 KHz (4x oversampling)."
Sound demos here:
http://www.beepstreet.com/ios
64 bit devices only.
Edit: Cinebient has already announced this. My apologies. My only excuse is excess enthusiasm!
http://www.kvraudio.com/forum/viewtopic.php?p=6862182