KOJ is a online judge system to learn computer program. It is written by Python 2.7 and runs on GAE (Google App Engine).
http://kut-oj.appspot.com/page/index/
KOJ System
(C) 2011-2012 Pine Mizune.
python-creole
:copyleft: 2008-2011 by python-creole team, see AUTHORS for more details.
:license: GNU GPL v3 or above, see LICENSE for more details.
google-code-prettify
Copyright (C) 2006 Google Inc.