Company WKode created these great apps:
iPlay Guitar, iPlay Kalimba, iPlay Harp, iPlay Duets, Squash Bug, IM Snowball, MIDI Fretboard - Guitar, Bass, Ukulele, Banjo, Shamisen, Sanshin, Oud, Pipa Controller, A+ MIDI Ukulele, 古琴 Guqin - Ancient Chinese Zither, iSplitHead Soundboard, and others..
