| GreekStemmer | This stemmer is an implementation of the stemmer described by G. |
| LancasterStemmer | A word stemmer based on the Lancaster stemming algorithm. |
| PorterStemmer | Copyright 2013 Katharopoulos Angelos <katharas@gmail.com> |
| RegexStemmer | This stemmer removes affixes according to a regular expression. |
| Stemmer | http://en.wikipedia.org/wiki/Stemming |