Keyword Box requires that you accept the following End-User License Agreement before installation can proceed:
Keyword Box is Copyright © 2007-2011 Pearl Crescent, LLC.
Keyword Box may be used in packaged, binary form for any legal purpose at no cost. Keyword Box is provided "as-is" and Pearl Crescent makes no other warranties with respect to its quality, performance, or fitness for any particular purpose.
If you are interested in licensing the source code or if you want to redistribute this add-on, please use our feedback page to contact us.
Feedback page: http://pearlcrescent.com/products/keywordbox/feedback/