This the br.ispell dictionary for Brazilian Portuguese. It's freely available
under the terms of the GNU GPL. You can freely redistribute and/or use it for
spell checking through ispell. The main page (in Portuguese) for this dictionary
is http://www.ime.usp.br/~ueda/br.ispell.

Homepage:
http://www.ime.usp.br/~ueda/br.ispell/summary.html
