http://vaultsofnagoh.blogspot.com/2011/07/small-but-vicious-dog-steals-hearts.html
Basically, a WFRP/ B/X mashup. Have just downloaded the files, but haven't had a chance to read.
Figured I'd share it here as I know it (WH) is a board favorite.
It's actually kinda cool. I'd play WFRP over it. But I'd play it over BD&D.
One rule I think I'd add to and D20 game I'll play from this point is
Combat
Rolling a natural 20 in melee allows you to make a follow-up attack during the same combat round.
Rolling a natural 1 in melee allows your enemy to riposte, making an additional attack against you.
Best way I've seen yet to handle nat 20's and 1's as I hate that 1's just mean auto-miss with nothing special and I hate the stupid fumble charts for 1's that I've also seen. Roll a 1 drop your sword, stab your friend and chop off your foot = fucking lame.
Looks interesting.
RPGPundit