Montreuil prison study a Less Miserables fic in which M. Madeleine (Jean Valejean's name when he lived in Montreuil) and Inspector Javert decide to see what effect prison has on 'good men' (as in, not criminals).

Pokémon: The Origin of Species, by daystar721. I'm sure it's been suggested before (I only checked back through until January of this year), but it is an exceptionally interesting work of rationalist fiction in my mind; I've always been interested in Pokémon, so it's great to see something with a rationalist bent to it.