C GPIO access library with the gpio command-line tool; ports exist for several non-Raspberry-Pi boards.
library
Knowledge about WiringPi
GPIO on Banana Pi: the RPi.GPIO and WiringPi ports only do simple I/O, and BCM numbers are translatedwarning · unverified · Banana Pi's docs point to ports of WiringPi (with gpio readall) and RPi.GPIO for boards like the BPI-M5, M2S, M4 Zero and F3. The RPi.GPIO port states that only simple I/O works — PWM, events and analog read are not implemented — apps need root, and BCM numbers are mapped to Banana Pi pins internally.