Hi all...I'd read through the results of the survey and there seemed to be a sentiment that people tend to build their own "in-house" utilities and don't share them. I have a small one, but if anyone wants to use it, they're of course welcome. I have made it available at: http://www.isi.edu/~hdaume/APP/ With some documentation. The basic idea is to alleviate the pain of dealing with stateful arrays (IOArrays and STArrays, for the most part, but really anything that is an instance of MArray). APP basically builds some syntactic sugar on to Haskell for dealing with these and now allows constructions like: Read: z <- array[|x|][|y|] Assign: array[|x|][|y|] <- expr Update: array[|x|][|y|] <-$ expr Use: array[|x|][|y|] >>= print It's not perfect and makes some errors (but rarely), but it's very fast and the translations are very simple (and, imo, obvious). The exact translations can be found on the web page or in the source code which is distributed thereon. Happy Haskelling! - Hal