To the best of my knowledge, all of the data-sets posted here are freely available for non-commercial use by bona fide researchers. Brief explanatory information on each of the data-sets can be found in an associated plain text file, named mnemonically, so for example the explanatory information for the data-set "heather.txt" is in the file "heather.explain.txt" If you do use any of these data-sets, please acknowledge their source, as given in the explanatory information.