A free program for Android, by timawesomeness.

You have probably heard about the Bluetooth connection, a technology that allows devices to exchange data over a short range without the need for a physical connection. This is useful because it allows you to use your device as if it were a remote control, without the need for a cable. This is useful for gaming devices because it allows you to play games from your smartphone or tablet without the need for a physical controller. It also has experimental support for Wii U Pro Controllers and other Nintendo controllers that pair similarly.