I have been writing my own hack for the Apocalypse World and while doing so went through a series of different hacks for that system. I have encountered two hacks that are build for Warhammer and decided to share them for you. You are welcome to check them out, try them out or use them as your inspiration.
Streets of Marienburg is a bigger supplement for World of Dungeons. It gives a small rules summary, character creation and whatnot to get the game started. It also has a handy reference for Marienburg that can be used in any game.
Eye of Chaos is an old hack that has little else than a starting point for a game. The knowledge of Apocalypse World is mandatory. It has a big list of Kislev names to be used though.
If there is more hacks for Apocalypse World or any other game I would be interested in them!