I found a demo version of How to Host a Dungeon, and somehow the idea really grew on me. Not just creating dungeons, but actually having methods of making gm prep work into a game.
I haven't seen this kind of work before, but I wondered if similar work has been done, just for different genres and/or scenarios. For example, it would be cool if a day-to-day zombie apocalypse event generator existed, since it could be useful for a semi-realistic survival horror campaign.
What similar work has been done that makes different kinds of prep work into a game?