Jam

Jam is an experimental multi-device music player that uses a built-in time synchronization mechanism.
Using a local Wifi connection, Jam allows you to play music in new interactive and exciting ways:

Surround Play:
Play the same music from a group of devices simultaneously, to get a surround system feel at any time and any location.

Turn Based Play:
Play music in turns: The music play will “move” from one device to the other automatically and will create a fun and dynamic music experience.

Jam also offers a “signaling” feature. You can signal all the Jam’s participants with vibration in a perfect sync.

Jam is very easy to use, and has a simple yet powerful interface that allows you to control all player features from all participating devices in a jam session.