sentences:  Other recent developments have been made by Michael Eskin, a programmer and piper in California, who has developed several virtual instrument emulator apps for the iPad and iPhone.Among these are bagpipes (including Scottish Highland and smallpipes, Irish uilleann pipes, and Swedish säckpipa), as well as a set of regulators for the iPad which can be played in concert with the uilleann pipe apps.He also produces concertina and accordion apps.