serialport
Node.js package to access serial ports. Linux, OSX and Windows. Welcome your robotic JavaScript overlords. Better yet, program them!
browser-serialport
Robots in the browser. Just like node-serialport but for browser/chrome apps.
node-pixel
Library for controlling addressable LEDs (such as NeoPixels) from firmata or Johnny Five.
raspi-board
Pin mapping functionality for the Raspberry Pi in Node.js
raspi
Provides access to Raspberry Pi peripherals from Node.js