Blunder 
Version 0.3 - December 26, 2010
by Dennis Sheil

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Blunder is released under the Gnu Public License, Version 3 (see COPYING)

The PNG's are released under the GNU Free Documentation License, Version 
1.2.  The SVG's the PNG's were derived from were also released under the 
Creative Commons Attribution ShareAlike 3.0 License and the BSD License.

One of the methods in Pgn.java is under
Creative Commons Attribution-ShareAlike 2.5 Generic license
Author: Joachim Sauer
Url: http://stackoverflow.com/questions/80476