Apache S4
Copyright 2013 The Apache Software Foundation

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

This product includes concurrency annotations, 
developed by Brian Goetz and Tim Peierls (http://jcip.net/)

This product includes software developed by Coda Hale and Yammer, Inc, which itself
includes code derived from the JSR-166 project (ThreadLocalRandom), which was released
with the following comments:

    Written by Doug Lea with assistance from members of JCP JSR-166
    Expert Group and released to the public domain, as explained at
    http://creativecommons.org/publicdomain/zero/1.0/