Create a Joystick Using the Arduino Joystick Library 2.0 : 12 Steps (with Pictures) - Instructables
GitHub - MHeironimus/ArduinoJoystickLibrary: An Arduino library that adds one or more joysticks to the list of HID devices an Arduino Leonardo or Arduino Micro can support.
Zerk Zone - Basic Joystick Arduino Library
Create a Joystick Using the Arduino Joystick Library 2.0 : 12 Steps (with Pictures) - Instructables
XY Joystick Control - Arduino Tutorial
Programming Ponderings: Arduino Joystick Library - Version 2.0
Arduino Leonardo/Micro As Game Controller/Joystick : 10 Steps - Instructables
Joystick functionality issue with encoders - Programming Questions - Arduino Forum