Google App Engine Java Runtime SDK - Dance Dance Droid Demo An example of a purely Ajax style application using Google App Engine and Google Web Toolkit. To compile and run this sample in 3 easy steps: (1) DOWNLOAD GWT 2.0 or later from: http://code.google.com/webtoolkit/ (2) COMPILE AND RUN: ant runserver (3) DANCE WITH YOUR CUBE MATE: * This step is optional.