Responsive web design is a web design approach aimed at crafting sites to provide an optimal viewing experience easy reading and navigation with a minimum of resizing, panning, and scrolling across a wide range of devices (from mobile phones to desktop computer monitors.
Joomla! is a free and open-source content management framework (CMF) for publishing web content. It is built on a model–view–controller web application framework that can be used independently of the CMS. Joomla is the platform that millions of websites are built on.