The code is all © Neil Mitchell 2004-2005. The initial version was done in my own time, and further refinement and reimplementation was done as part of my PhD. Various people gave lots of useful ideas, including my supervisor Colin Runciman, and various members of the Plasma group. In addition the following people have also contributed some code:
In previous versions, all the data was taken from Zvon's Haskell Guide. Thanks to their open and friendly policy of allowing the data to be reused, this project became possible. More recent versions use the Hierarchical Libraries as distributed with GHC.