1. WiringpiGordon's Arduino wiring-like WiringPi Library for the Raspberry Pi (Unofficial Mirror for WiringPi bindings)
5. Wiringpi PythonUnofficial Python-wrapped version of Gordon Henderson's WiringPi version 2.
6. WiringPi-RubyVersion 2.x of Gordon Henderson's Arduino-like WiringPi GPIO functions, wrapped up for Ruby.