There doesn't seem to be a thread to post fic recomandations, so I'm starting one.
First up "Children of the Cobb" by WastelandRose on FF.net.
http://www.fanfiction.net/u/950852/Post BDM AU. At least a decade down the road, Wash is alive, Mal and Inara are a couple, Simon and Kaylee are married and so are River and Jayne. And there are lots of little feet pattering around Serenity. And then the results of Jayne's 'wild oats' show up.
There are plenty of reasons to love this story. The best 'Wash doesn't die; bit I've read. Some of the best OC's ever. And if nothing else strikes your fancy, games of "Emergancy Surgery" aka "Oh no! Capt'n got shot again!" (banned, but who ever listens to Mal?).
And by all means pimp your own favorites here.