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A site is a collection of openly accessible, woven Websites that share a single domain name. Websites can be developed as well as preserved by an individual, group, organisation or company to offer a selection of functions. With each other, all publicly easily accessible sites comprise the Internet. Internet sites can be found in a virtually countless selection, including educational websites, information websites, online forums, social networks sites, ecommerce sites, as well as so on.
What is Pligg?

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