This is a D WormKit module, used to implement key bindings from within the game.
At least on my machine this method of key binding has considerably less input lag compared to using AutoHotkey.
Homepage: https://github.com/AndrejMitrovic/wkBindKeys
Install the wkBindKeys.dll and wkBindKeys.ini files into your WormsArmageddon folder.
For example it could be C:\Program Files (x86)\Steam\steamapps\common\Worms Armageddon if you're using Steam.
You can find these files on the releases page.
You will also need madCHook.dll. You can find it as part of the WormNat2 package.
See the wiki page: https://worms2d.info/WkBindKeys
Distributed under the Boost Software License, Version 1.0. See accompanying file LICENSE_1_0.txt or copy here.