NOTICE.txt

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

In addition, this product includes software developed by:

Facebook, Inc. (http://developers.facebook.com/thrift/ -- Page includes the Thrift Software License)

JUnit (http://www.junit.org/) included under the Common Public License v1.0.  See
the full text here: http://junit.sourceforge.net/cpl-v10.html

JRuby (http://jruby.org) is tri-licensed.  We include it under terms of the
Common Public License v1.0.

JRuby itself includes libraries variously licensed.  See its COPYING document
for details: https://github.com/jruby/jruby/blob/master/COPYING
    
The JRuby community went out of their way to make JRuby compatible with Apache
projects: See https://issues.apache.org/jira/browse/HBASE-3374)