iBend Midi Pro is a fantastic XY controller, you can set all midi controller and pitch bend on 4 axis are fully programmable (min value, max value, action on release, inverse axis, etc.)
Two Mod of play are available: Fix Mod, fixed midi values on the screen. Free mod, interpreter your movement. It’s very easy to use. iBend Pro is a universal app.
iBend is an Midi controller. No sound is generate by this application. Compatible with all AU and VST instruments.
WiFi Works without additional server software on OS X Tiger and above.
Also works on Windows XP, Vista, And 7 with free rtpMIDI driver.