This is a collection of wordlists, taken from the Brown University Standard Corpus of Present-Day American English. Filenames have the form postag-syllablecount.txt, where postag is the part of speech tag, and syllable count is the number of syllables in the word.
The part-of-speech tags form part of the corpus, and are described further here.
The syllable counts are taken from the pronunciations in the CMU Pronouncing Dictionary. Words not included in the CMU dictionary are ignored. In cases where there is more than one pronunciation listed, the first is used.