iCode Dual Atari Joystick, Paddle, Driving, and Trackball USB Adapter, Plus Edition
Build a USB Adapter for Retro Joysticks - Hackster.io
Odyssey 2 Joystick Controller Gamepad Joypad DB9 Style Plug for DB9 Po – RetroGameBoyz
Ultimate Arcader Joystick DB9 Black – Ultimate Mister FPGA
Ultimate Arcader Joystick DB9 Black – Ultimate Mister FPGA
UNITHOR - A Brand New Joystick For Retro Computers by UNI-joy — Kickstarter
Bluetooth Wireless Atari Joystick and Paddle Adapter - 2 DB9 Ports | eBay
THAT @REM SHOW on Twitter: "This is my full gamut of joysticks, all of which are DB9 ports (not usb). In order: QuickShot (crap), megadrive pad (pretty good), custom nes-type pad (cheap),
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
Atari joystick port - Wikipedia
Manette joystick zipstik db9 9 pin amstrad atari commodore a à Sucy En Brie | Clasf informatique
Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables