Joomla is the second-most popular content management system behind WordPress. Similar to WP, it can be used to build a variety of websites and applications for businesses, schools, non-profits, online stores, and so much more. Because Joomla doesn’t offer a paid option like WP and is geared towards a more experienced user, your only means of support is searching through their forums and developer communities for help.
The one thing you didn’t discuss much in your article is how easy for the client it is, using the CMS *after* the developer walks away. One reason I love WP is I can show you how to add a new blogpost in 10m flat, regardless of your tech ability – and barring that, set up an email drop so it’s even simpler. October fits the mold of Joomla, Drupal, and a few others with a learning curve that’ll be quite a bit steeper for some clients. Why You Shouldn't Use WordPress! And Why WordPress is Bad