UsendMii

UsendMii is an application that lets you use your Wii U GamePad on your computer. This program also allows you to view MP4 videos stored on your PC on the Wii U GamePad and on your TV.

UsendMii is an HTTP server that delivers web content to the Wii U Internet browser. The Internet browser uses specialized JavaScript to obtain button states of the GamePad. The tool will simulate keystrokes, mouse motions, or button clicks.