Softaculous is a free auto installer for cPanel and DirectAdmin. It allows one-click installation of many popular open source web applications. It supports more than 100 software packages. It is similar to Fantastico in cPanel. You must have SSH access to install Softaculous in the server.

Steps::

1. cd /usr/local/cpanel/whostmgr/docroot/cgi

2. wget -N http://www.softaculous.co/ins/addon_softaculous.php

3. chmod 755 addon_softaculous.php

Now go to :

WHM >> Plugins (Add-Ons on older versions than 11) >> Softaculous - Instant Installs

Softaculous webpage will open if the installation was successful