title: What is the difference between Template Engines and Preprocessors?
body: <p>There are <strong>Template Engines</strong> and there are <strong>Preprocessors</strong>.</p>
  
  <p><strong>List of some Template Engines</strong></p>
  
  <ul>
  <li>Smarty </li>
  <li>Twig </li>
  <li>TinyButStrong</li>
  </ul>
  
  <p><strong>List of some Preprocessors</strong></p>
  
  <ul>
  <li>Haml </li>
  <li>Slim </li>
  <li>Jade / Pug</li>
  </ul>
  
  <p>What exactly is the difference?</p>