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.
While using web site templates a person needs to be careful about certain things. It would not be a good idea to opt for the wrong theme design. This will give one‘s site a dated look which is definitely not desirable. One should also ensure that a template is in sync with the theme and content of a site. For instance, a children site should not use a corporate theme based template. This looks quite unprofessional and mars the appeal of the site.