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Wikipedia (41)
Web Pages
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Citizendium http://en.citizendium.org
Wiki with stricter editing rules and obligatory disclosure of editor's real names.
Connected: An Internet Encyclopedia http://www.freesoft.org/CIE/
The engineering, theoretical concepts, and organizations of the Internet (freely distributable).
dKosopedia http://www.dkosopedia.com/
A collaborative project of the DailyKos community to build a political encyclopedia.
Everything2 http://www.everything2.com/
An extensively hyperlinked collection of facts, ideas, notes and humor to which anyone can add.
http://cunnan.sca.org.au http://cunnan.sca.org.au
An encyclopedia for reenactors of the Middle Ages and Renaissance period with a heavy slant towards members of the Society for Creative Anachronism.
Memory Alpha http://memory-alpha.org
A peer edited Star Trek encyclopedia.
Musipedia http://www.musipedia.org/
A collaborative music encyclopedia. Contains melodies and musical themes from classical, popular, and folk music. Can be searched based on the melody alone, either by playing it on a keyboard, whistling or singing, or by entering the melodic contour as Parsons Code.
Open Site http://open-site.org/
A volunteer-run open content encyclopedia.
PlanetMath http://planetmath.org/
Collaborative, peer-reviewed mathematics encyclopedia with TeX input, inspired by MathWorld (GNU Free Documentation License).
Plastics Wiki http://plastics.inwiki.org/
Wiki-based website dedicated to plastics technology, polymer materials, equipment and other things related to polymers and plastics.
SourceWatch http://www.sourcewatch.org/
A directory of people, organizations and issues shaping the public agenda. It catalogs PR firms, activist groups and government agencies as well as the criticisms that are made of these groups from different perspectives.
Technomanifestos Network http://www.technomanifestos.net
Collaborative resource on the history of computing and the Internet (GNU Free Documentation License), and the online companion to the book Technomanifestos.
Wikipedia Article - Nupedia http://en.wikipedia.org/wiki/Nupedia
Nupedia was a public peer-reviewed general encyclopedia created by volunteer scholars, with resources for readers and contributors (GNU Free Documentation License). It can be considered to be Wikipedia's direct ancestor.

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