Linasf is a PHP implementation of a SpamAssassin-like spam filter. It uses Bayesian Filters, User-defined rules and Artificial Neural Networks to obtain excellent results.
Training and integration with current PHP system is very easy. (uses MySQL as DB)
Classifier4J is a java library that provides an API for automatic classification of text. The default (and only current) implementation of this API is a Bayesianclassifier.
This library can be used for multiple purposes - as a spam filter or a blog cl