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Pearltrees [pearltrees.com] is a new online visualization tool that allows users to organize their favorite content found on the Web as a network graph, which then reveals the connections between the interests of people. Or, in other words, Pearltrees is a somehow alternative visual version of the social bookmarking concepts that drive delicio.us, or a "collaborative network" that let users create, organize and share the world of their interests. However, in contrast to a tag-based system, Pearltrees connects people by the real content that is shared.

Users can save their favorite websites, organize what they find interesting, and explore what others have saved and are saying about specific web destinations.

You can watch a documentary video below. Via Mashable.