Lemur Input Device

The Lemur Input Device is a highly customizable multi-touch device from French company JazzMutant, which serves as a controller for musical devices such as synthesizers and mixing consoles, as well as for other media applications such as video performances. As an audio tool, the Lemur's role is equivalent to that of a MIDI controller in a MIDI studio setup, except that the Lemur uses the Open Sound Control (OSC) protocol, a high-speed networking replacement for MIDI. The controller is especially well-suited for use with Reaktor and Max/MSP, tools for building custom software synthesizers. It is currently discontinued in light of competition from current multitouch input computers.
Creating an interface.
The Lemur comes with its own proprietary software called the JazzEditor to create interfaces. Users can build interfaces using a selection of 15 different objects (including fader, knobs, pads, sliders...), group them as modules and arrange them using as many pages as needed. Each object can then receive any MIDI or OSC attribute. A particularity of the Lemur is the ability to modify the physical behavior of each object (for instance adding or removing friction on faders).
The internal memory of the Lemur enables the storage of many interfaces, each one controlling a specific software for instance.
Rebirth.
The Lemur has been made into an app for iOS and Android by the company Liine (founded by Richie Hawtin). 
Famous users.
The Lemur has been used by several famous artists.