VCtrlsJoystick is a high performance on screen joy stick that runs on the new unity 4.6 UI system that takes advantage of the new event system in 4.6.
Features:
Full support for multi-touch and multiple sticks.
Ready to use Prefabs.
Manager to easily get data from joysticks in the scene (works similar to the default input class.)
Vertical and horizontal constraints.
Floating joystick support.
First Person Exmeple.