"KeyStone" is Pixelsparadise.com first Joomla template release in September 2013. "KeyStone" is a well designed, modern and responsive HTML5/CSS3 template for Joomla 3.0+.  It based on "Bootstrap"a flexible width grid framework (which is also used for the Joomla backend) and modern lightweight code. The template itself was created for a modern design agency or App presentation, but of course you can use it for a lot of other website types which needs a modern and friendly look&feel.