The Puzzle Party Console or just Puzzle Console is an open source Django web application for running a puzzle party or puzzlehunt. An early version was written by James Dabbs for APP4 and the current incarnation was written by James Dabbs and Steven Clontz for APP5.
The authors hope you'll consider using it in your puzzle competition! Contact them on GitHub or by email if you are interested.
https://github.com/jamesdabbs/puzzle-console