With the upcoming hackathon[1], and its timely focus on real world libraries, infrastructure and tools support, I've started a list of truly missing libraries, for particular problem domains. If you have a problem, for which you think there *should* be a Haskell library, please add it to this page: http://haskell.org/haskellwiki/Wanted_libraries Or, if you see a 'missing' entry there, but happen to know of a real library that solves the problem, add it to the list. If you feel an existing library isn't suitable for a task, note this in the 'could be improved section'. A good constructive list here will help focus developer efforts, and someone may just step up with the code! -- Don The future only happens if we write the code. 1. http://haskell.org/haskellwiki/Hac_2007