There is always a great deal of Joomla! development activity underway and communicating with other developers in the community is essential. This site is a resource for anyone looking to build or maintain software based on the Joomla! platform. https://developer.joomla.org/
Drupal.org.uk promotes Drupal in the UK - which includes organising UK events, enabling local Drupal developers to keep in touch, and generally encouraging Drupal connections from Land's End to John o'Groats. http://www.drupal.org.uk/
Joomla! already is a rich featured content management system, but if you're building a website with Joomla! and you need extra features which aren't available in Joomla! by default, you can easily extend it with extensions. There are five types of extensions for Joomla!: Components, Modules, Plugins, Templates, and Languages. Each of these extensions handle