4 fins from somewhere downunder, it seems tha downunder they have intresting non-conventional profiles. It is hard to find any pictures beside the http://www.gps-speedsurfing.com/ postings but I found a few!
Timemachine TM45 22cm, full carbon fin. The fin has a normal rake for its length, profile thickness looks from this point quite far in the back. Carbon fins are famous of their quick responsiveness, if the constructor applied a good lay-up.
Timemachine TM V7 23cm, assymetrical full carbon fin. The fin has a normal rake for its length, profile thickness looks from this point quite far in the back. Carbon fins are famous of their quick responsiveness, if the constructor applied a good lay-up.
KA Sails “Lockwood Mcdougall assymetical speedfin”. Made out of G10, fin has got a lot of rake, and profile is quite thick. In theory this could be a fast vin on crosswind courses.
C3 Venom 24cm, very less power for its lenght making this fin good for extreme conditions for giving lenght. Crosswind/slalom should be no problem. But when wind is a bit less it might be hard to maintain speed. With the C3-fins you have to use a bit longer fin, I think in choppy conditions this is really good.