Apache Lucene
Copyright 2006 The Apache Software Foundation

This product includes software developed by
The Apache Software Foundation (http://www.apache.org/).

The snowball stemmers in
  contrib/snowball/src/java/net/sf/snowball
were developed by Martin Porter and Richard Boulton.
The full snowball package is available from
  http://snowball.tartarus.org/

The Arabic stemmer (contrib/analyzer) comes with a default
stopword list that is BSD-licensed created by Jacques Savoy.  The file
resides in contrib/analyzers/src/java/org/apache/lucene/analysis/ar/stopwords.txt
See http://members.unine.ch/jacques.savoy/clef/index.html.

Includes lib/servlet-api-2.4.jar from  Apache Tomcat