This page uses the Gamepad API to visualize your controller inputs. You can activate chroma key mode to use it on stream or whatever.
Note that not all browser implement the API, I recommend Chrome or Firefox (on OS X only Firefox works for me).
Multiple controllers are not supported yet.
If you need more/different skins just contact me, I don't bite ;-)
Buttons are not being counted when no animation frames are being requested (e.g. window is minimized, this tab is hidden/another tab is active)!