TouchOSC is an application for the iPod touch and the iPhone. It provides several control surfaces and communicates (Open Sound Control) messages by wi-fi. OSC was originally designed for music applications but is flexible enough to be used for anything. These sample applications take the “simple” screen from TouchOSC and receive incoming messages from it and use these messages to re-create the TouchOSC screen. There is an example for each of the separate screens and one that combines them all. This is the one shown in the video below. A further example, again shown in the video demonstrates both receiving and sending messages with the TouchOSC.