http://alias-i.com/lingpipe/index.html
http://gate.ac.uk/
http://rapid-i.com/content/view/181/190/
http://elefant.developer.nicta.com.au/
(tanagra, weka, orange, (depending on what what you're looking for) )
http://alias-i.com/lingpipe/index.html
http://gate.ac.uk/
http://rapid-i.com/content/view/181/190/
http://elefant.developer.nicta.com.au/
(tanagra, weka, orange, (depending on what what you're looking for) )