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
Boffintronics C64 / Atari Joystick Adapter for Raspberry Pi
AUKEY USB C Hub Ultra Slim with 4 USB 3.0 Data Ports Black CB-C64 - Newegg.com
9 Pin Joystick to USB Adapter
USB C64 Joystick adapter (for emulator) - Commodore Remix
Cheap and Easy Arduino C64 Keyboard to USB Adapter - Retro Game Coders