RemoteWikiURL: http://www.wikipedia.org/wiki/

A free wiki-based encyclopaedia with 150000+ pages. Looks very cool. Every visitor is welcome to participate in writing articles.

It exists in several languages. The largest communities after the english one are german (25000 Articles), polish and french.

http://fr.wikipedia.org http://de.wikipedia.org http://pl.wikipedia.org

(Article numbers for juli 2003)

The Esperanto version of the wikipedia surpassed 10k articles in early 2004. http://eo.wikipedia.org