MALLET For Mac

MALLET is a free Java-based package for statistical natural language processing, topic modeling, information extraction, document classification, clustering, and other machine learning applications to text.

MALLET includes sophisticated tools for document classification: efficient routines for converting text to "features", a wide variety of algorithms (including Naïve Bayes, Maximum Entropy, and Decision Trees), and code for evaluating classifier performance using several commonly used metrics.

MALLET provides facilities not only for document classification, but also information extraction, part-of-speech tagging, noun phrase segmentation, and much more.

The development of the library is quite mature, however it does not yet have as polished front-ends or documentation as rainbow.