onoff
GPIO access and interrupt detection with Node.js
i2c-bus
I2C serial bus access with Node.js
pigpio
Fast GPIO, PWM, servo control, state change notification, and interrupt handling on the Raspberry Pi
nectarjs
Javascript's God Mode. No VM. No Bytecode. No GC. Just native binaries.
cncjs
A web-based interface for CNC milling controller running Grbl, Marlin, Smoothieware, or TinyG