Keyboard Button Mapping for Xbox Controllers - Xbox Wire
Prototype using keyboard and gamepad as triggers.
Two-In-One: How to Turn Your Game Controller Into a Computer Mouse
Play Any PC Game with a Gamepad Using JoyToKey
Controller Isn't Working in the Game – Parsec
Game Controller Tester Gamepad on the App Store
What is the point of the big black button on the PlayStation 4
Switch Bluetooth 4.0 And 2.4GHz Wireless Gamepad,Mobile Game
configure_a_controller [Batocera.linux - Wiki]
Getting Started for Players (Steamworks Documentation)