Music app that emulates the sounds of 1970s Mellotron made famous in recordings by the Beatles, King Crimson, Yes, Genesis, and The Moody Blues. Cool retro-sounding app with great attention to sonic detail that is unfortunately marred by a clicking sound when notes are released.

Amazing Piano is a music app for iPhone and iPod touch that allows the user to “play piano” via an onscreen QWERTY keyboard. It features both free and practice modes, the latter for playing melodies by pressing keys as the letters for them scroll across the screen.

Pianofly by Pro Synth is a programmable FM synthesizer app featuring a one-octave onscreen piano-style keyboard. It uses a novel approach for accessing notes outside of this range; the player simply flings the keys to the right or left.