From http://www.cs.bris.ac.uk/Teaching/Resources/COMS40203/boggle.html

Reconstituted java sources (Boggle*/*.jad) from the class files here were
created by Jad (http://www.geocities.com/SiliconValley/Bridge/8617/jad.html)

(See also http://www.centralconnector.com/GAMES/boggle.html for
the source of the rules/helpdoc images)