A cheap-ass, CLR/Mono spellchecker based on Peter Norvig's Python Bayes demo All the interesting work is his.
The interesting external methods are
known()filters a list of words and returns only those in the dictionary,correct()returns the best guess for the supplied wordguesses()returns all guesses for the supplied wordadd()adds a word to the dictionary, with an optional priority value
So simple uses would be something like
import spelchek
print spelchek.correct('eaxmple')
# 'example'
The current corpus of words includes about 75,000 entries. It does not include punction such as hyphens, apostrophes or spaces. The module also supports optional user-supplied dictionaries.
The heart of a spell checker is the dictionary, and the dictionary here is cadged together out of a bunch of free online sources. No really effort has been made to check it for accuracy, and although it's trivially correct with several tens of thousands of words involved errors are pretty much inevitable (if you find one, feel free to submit a pull request and I'll update corpus.txt as needed).
This module is written in Boo. You can compile it using the SLN file in MonoDevelop, or from the command line using
booc -debug- -embedres:corpus.txt -target:library BooSpell.boo