There is a wide range of CMS‘s available for use. Some of them are free like Joomla, WebGUI, Bricolage, Mambo and some of them are commercial ones like Bitrix, Drupal, etc. Joomla notably stands out from the other CMS‘s thanks to its quality and usability.
Website templates are also extremely well coded. What does this mean to you? Well let‘s assume you do not know anything about coding. You are going to want to make small changes to the templates, but you may not know what you are doing. Learning how to make these minor changes will only take a few minutes in most cases. These templates are very well coded, usually with the most up-to-date coding methods. So you will never need to worry about this. Not to mention the fact that website templates are very search engine optimization friendly.