Check out this cool adapter for controlling a Commodore Amiga with a PC Analogue Joystick (fitted with 15 pin Gameport plug).
It's really  compact at just 4cm long, and as it's PCB based, it is much more robust than cable-based adapters.
 
Now you can play those Amiga flight sims as they should be played!
 
Here's a list of just some of the Amiga games that you can play with a PC analogue joystick:
A-10 Tank Killer Version 1.5
Air Warrior
AV8B Harrier Assault
Birds of Prey
Descent: Freespace- The Great War
F-15 Strike Eagle II
F-19 Stealth Fighter
FA-18 Interceptor
Fighter Duel Pro/Pro 2
Flight of the Intruder
Flight Simulator 2
Gunship 2000
Jet Pilot
Knights of the Sky
MicroProse Formula One Grand Prix/World Circuit
MiG-29 Fulcrum
MiG-29M Super Fulcrum
Reach for the Skies
Red Baron
Tornado OCS/ECS/AGA
 
These adapters work better with the simpler type of analogue joystick that just contains two potentiometers such as the joystick in the photo.
 
Joysticks with advanced features such as motion sensing, programmable buttons etc may not be compatible.
 
Contents:
 - PC to Amiga Analogue adaptor
 - 2 x securing screws
 - Instructions
 
Instructions:
• Connect the joystick to the adapter.
• Plug the adapter to your retro computer joystick port.
• Start the game and select "Analogue Joystick Mode".
• Play the game!