<p>I don't think that St. Louis University and American University have supplements. I know that Butler University and the University of Denver don't. Note that the common app list itself isn't always correct; for instance, Augustana in Illinois is on there as having no supplement but they do have a (short-answer, not essay) supplement on their website. People who apply with just the common app are sent the Augustana supplement to fill out.</p>
<p>Still, the common app link is a great place to start.</p>