Raspberry Pi - PSU
Formally known as Raspberry Pi Power Button (rpi-pwrbtn).
To be used in the Marshmallow Entertainment System, it allows the Raspberry Pi to be powered ON or OFF from an external power button simiar to the XBOX's own power button.
Hardware License
CERN OPEN HARDWARE LICENSE v1.1
Disclaimer
It works for me, so USE AT YOUR OWN RISK.