There's a big list at http://www.haskell.org/haskellwiki/Applications_and_libraries/Web_programming http://www.haskell.org/haskellwiki/Applications_and_librarie

There's a big list at http://www.haskell.org/haskellwiki/Applications_and_libraries/Web_programming http://www.haskell.org/haskellwiki/Applications_and_librarie... I haven't used any of these, and none of them look super-compelling to me, though HAppS seems fairly mature and full-featured.