Joomla

Note: to use Joomla, you have to create an account in the application itself first.

Joomla is an award-winning content management system (CMS) from http://www.joomla.org, which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available. Best of all, Joomla is an open source solution that is freely available to everyone.

You can access Joomla from anywhere with https: (this is for outside, so be warned it does allow access to part of your server from the outside world). Tutorial Here

Theres also a handy way to upgrade your Joomla version. (requires command line) Joomla/Update_Joomla_by_Hand