English spelling functions with an emphasis on simplicity. (http://darcsden.com/kowey/minimorph)
Cheap English morphology
This package is written to help you with things related to how English words are formed, eg. plurals, word endings, part of speech agreement, 'a' vs 'an' determiner choices.
It's not meant to provide anything resembling a full account of English morphology. You're still going to need a list of exceptions or perhaps someday work with a more advanced package. The goal of this package is to hit that some bang, no buck, sweet spot so you can crank something out quickly and hopefully replace at a better time.