The MOST powerful touch controller available.

I pined over the Lemur when it first was released, but never got to buy it for its $2K price tag... now, finally, I have it for only $50 and the price of an iPad. UPDATE: Only $10, now!
Im an avid user of Ableton Live, and have successfully set up Mu to function with this app. Its a work of art, an amazing - super customizable - controller, that offers anything and everything the user could want, only limited by your willingness to set it up. EDIT: Now LiveControl 2 is the way to go!
Setup is not simple. It takes a bit of learning to understand how to edit the templates in the Lemur Editor, but its alot of fun to create a controller thats your own... just the way you want.
In order to use Mu, the Ableton API controller, Max For Live must be purchased and installed.
If you have the Live, the Lemur App, and Max for Live... Put the Mu 1.2 folder in the Cycling 74 folder, and drop the Mu.amxd (Max Device) into Lives Master channel, and the Lemur App will instantly update the Template and mock whatever youve created in Live.
EDIT: Setup is simpler than ever, and now USB>Lightning connections are supported, instead of just wifi.

SkyMakai about Lemur