Wii Nunchuck - Intel® Galileo & Node.js
Galileo Node.js Nunchuck I2C Code
There are several different "adaptors" on the market that allow you to hook a Wii Nunchuck up to a breadboard easily. I tried two different kind and liked the Nunchucky by Solarbotics the best

Node-webkit desktop app (graph of accel data, displays joystick movement)
This demo requires node-webkit and launch script is written for OSX (but the demo runs equally well on Linux/Windows)