How can I create responsive joystick-layout buttons in HTML? - Stack Overflow
Create A Onscreen Joystick With Pure JavaScript - JoyStick.js | CSS Script
Implementing a free touch Joystick for your game in Phaser.js | Our Code World
Android games with native gamepad support - JayceOoi.com
Making a simple Gamepad Web Component | by Diego González | Samsung Internet Developers | Medium
Virtual Gamepad in JavaScript - DEV Community
Touch-enabled Virtual JoyStick Controller In JavaScript | CSS Script
NETNEW SUP-PS4-A Wireless PS4 Controller Vibrate Console Game Handle Bluetooth Gamepad Rechargeable For PS 4 Dual Double Vibration Shock - VIP Outlet
How to Design a Realistic Gamepad
Virtual Gamepad in JavaScript - DEV Community
Add a wireless gamepad controller to your Nintendo Switch for $14 (Update: Expired) - CNET
GamepadChecking for Specific GamepadsRetrieving Gamepad Information | Samsung Developers
Custom PS4 controller skins for GamePad viewer by jayraydee.media@gmail.com - Album on Imgur
Vulkan
GitHub - bobboteck/JoyStick: A simple JoyStick that use HTML5, Canvas and Vanilla JavaScript, for touch and mouse interfaces (no JQuery required), preview at:
Using The Gamepad API In Web Games — Smashing Magazine
Using the HTML5 Gamepad API to Add Controller Support to Browser Games
Wireless USB Game Controller review — The MagPi magazine
Archos GamePad review: Archos GamePad - CNET
Gamepad API and Xbox Controller on Mac
Razer Kishi Mobile Game Controller / Gamepad for Xbox Android USB-C – HHgregg Electronics