This page http://programmers.stackexchange.com/questions/46716/what-sh... suggests that both bcrypt and scrypt can be used (4th bullet under 'Security'). Disclosure: I added the scrypt part alongwith the references which the mods haven't deleted yet (so I am guessing it is ok).
I just went with bcrypt in my project for now because postgresql has it as a built-in function. I couldn't find for scrypt that was readily usable.