This may be on here already, but i found this site a little bit ago and thought i'd share. I used it on a few of my known acro's and seems to be pretty accurate. So if you have acro that you call "the pretty blue one" this might help you out
http://www.shadowramysreef.com/compo...ing-sps-corals
There's a link to a zoa ID page on there too, Decent amount in there, but i'm sure some poeple on here could make a bigger one from what's in their tank.