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  • Open Site
  • open-site.org
  • A volunteer-run open content encyclopedia.
5.0
(4)
>180
5
  • PlanetMath
  • planetmath.org
  • Collaborative, peer-reviewed mathematics encyclopedia with TeX input, inspired by MathWorld (GNU Free Documentation License).
4.1
(1)
>80
6
  • Everything2: Tulips & Chimneys
  • www.everything2.com/index.pl?node_id=539066&lastnode_id=0
  • Table of contents for this book of poetry written by E.E Cummings.
4.0
(4)
>740
5
  • Citizendium
  • en.citizendium.org
  • Wiki encyclopedia project in which authors use their real, verified names and recognized subject experts can guide the development of citable articles.
4.0
(si*)
>90
5
  • Ekopedia
  • www.ekopedia.org
  • Ekopedia is an encyclopedia about alternative life techniques with strong focus on ecological impact.
3.9
(si*)
-
4
  • SklogWiki
  • www.sklogwiki.org
  • An open wiki for statistical mechanics and thermodynamics.
3.6
(si*)
-
4