For this site I was asked to create an advanced RSVP system. I built extension onto the current admin area using Smarty as a templating system. Admins can add/edit/delete/view/print both new RSVP listings and RSVP registrants. A username and password is given to a recipient list which then logs into the front of the site and views the RSVP they were invited to. They can then register for the event if there are seats still available (which a seat count is presented to them on the page).