Wiki encyclopedia project in which authors use their real, verified names and recognized subject experts can guide the development of citable articles.

The engineering, theoretical concepts, and organizations of the Internet (freely distributable).

An encyclopedia about alternative life techniques with strong focus on ecological impact.

An open wiki for statistical mechanics and thermodynamics.

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.