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A site is a collection of openly available, woven Web pages that share a single domain name. Websites can be created and maintained by an individual, group, business or organization to offer a range of purposes. With each other, all publicly easily accessible internet sites comprise the Web. Web sites can be found in a nearly endless selection, consisting of educational sites, information websites, forums, social media sites, e-commerce sites, and more.
What is Pligg?

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