USB C64 Joystick adapter (for emulator) - Commodore Remix
Classic Atari Joystick to USB Adapter - YouTube
DB9 joystick to USB adapter acting weird on C64 : r/c64
Retronics USB Joystick Adapter and Other Coolness with V-USB | Code and Life
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
USB Joystick Adapters – breadbox64.com
USBJoy2.0E adapter - Extended Version. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers