Thanks for Hunspell, it's good!
Very primitive software. The dictionaries are incomplete and obsolete, and the spellchecking algorithm is very primitive. It misses most of the features implemented by commercial software, such as compound words support, multi-word checking, etc.
No serious help anywhere, dictionaries are all outdated, no single help on how to write the .aff rules, or even what they stand for, how can you expect people to keep dictionaries up-to-date if they can nowhere find the layout & meaning of the files.... CRAP, hopefully a worthy replacement soon.