Company David Koren created these great apps:
Koren BC - MELODEON, Koren DG - MELODEON, Koren GC - MELODEON, Koren CF - MELODEON, Koren CisD - MELODEON, Koren pro3 - play like a professional, Koren pro4 - harmonika - play like a professional!, Koren trio3 - live trio band on accordion, Koren trio4 - live trio band on accordion, Koren gold - golden accordion, Koren silver - harmonika, Koren Steirische harmonika - play like Markus Grill, and others..
