A site is a collection of openly available, woven Web web pages that share a single domain name. Sites can be developed and kept by an individual, team, organisation or organization to serve a selection of purposes. With each other, all openly easily accessible web sites constitute the Web. Web sites can be found in a virtually endless variety, consisting of academic sites, news sites, online forums, social networks sites, e-commerce websites, and more.
What is Pligg?

Pligg is an open source content management system that lets you easily create your own user-powered website.