http://homepages.inf.ed.ac.uk/wadler/realworld/ (new link works as of Mar2004)
A list of functional programs applied to real-world tasks maintained by PhilipWadler, where both 'functional' and 'real-world' are defined rather loosely.
Languages covered include Erlang [ErlangLanguage], Scheme [SchemeLanguage], Haskell [HaskellLanguage], OCaml [ObjectiveCaml] Clean [CleanLanguage], Miranda [MirandaLanguage] and Standard ML [SmlLanguage].