To the client, cPanel provides front-ends for a number of common operations, including the management of PGP keys,crontab tasks, mail and FTP accounts, and mailing lists.
Several add-ons exist, some for an additional fee, the most notable being Auto Installers like Installatron, Softaculous, and WHMSonic SHOUTcast radio Control Panel Add-on). Auto Installers are a bundle of scripts which automate the installation (and update of) web applications such as WordPress, SMF, phpBB, Drupal, Joomla , Tiki Wiki CMS Groupware Geeklog, Moodle, WhyUnified.com, MagicSpam WHMCS, and ZamFoo. Fantastico is a popular Auto Installer but is losing market fast because of lack of updates see and fewer number of scripts. There are free versions of the auto installers, however, they are very limited on the script the provide, and often leave out the most popular scripts like WordPress. The add-ons need to be enabled by the server administrator in WHM to be accessible to the cPanel user.
WHM manages some software packages separately from the underlying operating system, applying upgrades to Apache, PHP, MySQL, Exim, FTP, and related software packages automatically. This ensures that these packages are kept up-to-date and compatible with WHM, but makes it more difficult to install newer versions of these packages. It also makes it difficult to verify that the packages have not been tampered with since the operating system's package management verification system cannot be used to do so.