Apache Asynchronous Web Framework

Alternative collection types provided by guava-libraries (superset of the old Google Collections Library)
http://code.google.com/p/guava-libraries/
Copyright (C) 2007 Google Inc.

Logging library (successor to the popular log4j project).
http://logback.qos.ch/
Copyright (C) 2010 QOS.ch

Http client library used by unit tests.
http://hc.apache.org/
Copyright (C) 2005-2010 Apache Software Foundation

javax.activation (using javax.activation.MimetypesFileTypeMap for mime-type header deduction)
http://download.oracle.com/javase/6/docs/api/javax/activation/package-summary.html
Copyright (C) 1993, 2010, Oracle and/or its affiliates. 

Asynchronous Http client library used by unit tests.
https://github.com/AsyncHttpClient/async-http-client
Copyright 2010 Ning Inc