johnny-five
The JavaScript Robotics and Hardware Programming Framework. Use with: Arduino (all models), Electric Imp, Beagle Bone, Intel Galileo & Edison, Linino One, Pinoccio, pcDuino3, Raspberry Pi, Particle/Spark Core & Photon, Tessel 2, TI Launchpad and more!
node-red-node-arduino
A Node-RED Node, to talk to a chip as I/O extender, which is running Firmata firmware
browser-serialport
Robots in the browser. Just like node-serialport but for browser/chrome apps.
mraa
IO library that helps you use I2c, SPI, gpio, uart, pwm, analog inputs (aio) and more on a number of platforms such as the Intel galileo, the Intel edison and others