Apache tiles is a java templating framework built to simplify the development of web application user interfaces. tiles allows authors to define page fragments which can be assembled into a complete page at runtime.

tiles grew in popularity as a component of the popular struts <http://struts.apache.org/1.x/> framework.

it has since been extracted from struts and is now integrated with various frameworks, such as struts 2 <http://struts.apache.org/2.x/> and shale <http://shale.apache.org/>.