app/assets/javascripts/templates/footer.jst.ejs
<div class="container">
<div id="tools">
<h3>Powered by</h3>
<ul>
<li><a href="https://cloudant.com/"><img alt="Mozilla Firefox" height="30" src="/assets/cloudant-logo.png" /></a></li>
<li><a href="http://heroku.com/"><img alt="Heroku" height="30" src="/assets/heroku-logo.png" /></a></li>
<li><a href="http://www.rubyonrails.org/"><img alt="Ruby on Rails" height="30" src="/assets/rails.png" /></a></li>
</ul>
</div>
</div>