title: Does CodeIgniter have plugins / extensions / modules?
body: <p>I am looking at few <code>PHP</code> frameworks and noticed that they all offer re-usable, community-contributed code in various forms:</p>
  
  <p>-<strong>Symfony 2</strong> (bundles): <a href="http://knpbundles.com/" rel="nofollow noreferrer">http://knpbundles.com/</a><br>
  -<strong>Zend Framework 2</strong> (modules): <a href="http://modules.zendframework.com/" rel="nofollow noreferrer">http://modules.zendframework.com/</a><br>
  -<strong>CakePHP</strong> (plugins): <a href="http://plugins.cakephp.org/" rel="nofollow noreferrer">http://plugins.cakephp.org/</a><br>
  -<strong>Yii Framework</strong> (extensions): <a href="http://www.yiiframework.com/extensions/" rel="nofollow noreferrer">http://www.yiiframework.com/extensions/</a></p>
  
  <p>but I can't find anything for Code Igniter (<em>I saw in <a href="https://stackoverflow.com/questions/6036648/installing-plugins-in-codeigniter-2-0-2">this SO post that Code Igniter used to have plugins that were replaced by helpers</a>, but when I google for "Code Igniter helpers" or "Code Igniter plugins" I can't find any repositories</em>).</p>
  
  <p><strong>What is the name for Code Igniter community-contributed and reusable libraries? Can you share a link to their main repository?</strong></p>