This is the system we used in order to process the vast number of applicants for the machine learning summer shcool (MLSS) at Cambridge. 
This code has been made available open source so it could be re-used for subsequent summer schools.

A demo is available here: http://mlss.ksikes.net with instructions: http://mlss.ksikes.net/account/help

Read INSTALL on how to install and PAYMENTS_INSTRUCTIONS on to how process payments.

For questions / suggestion please email Alex Ksikes (ak469 at cam dot ac dot uk).