I created a Java applet for training my friend Marco who, in Spring 2005, was selected for partecipation at the italian instance of the popular TV format "who wants to be a millionaire", named "Chi vuol essere milionario": the applet implements the "Fastest Finger First" preliminary game; it has proven effective (and Marco's fingers fast enough) since he passed the qualification game at the second attempt (among 6 total attempts, and 9 other players). Eventually Marco won 35000€.
Drop me a line if you want a copy of the applet (even for your own training, if you are a lucky "who wants to be a millionaire" candidate).

I also created a Java application for automatically answering quiz questions based on Google searches.  You just type the question and the four answers, and the tool responds with answer probabilities after few seconds.