Nomic

Blind Nomic
A variant with rules unknown to the players.
http://www.geocities.com/TimesSquare/Alley/7326/

CharNomic
Defunct group. An archive of players, rulesets, proposals, and judgments.
http://www.tesseract.org/nomic/

NomicWiki
A space for collaborative maintenance of various documents related to the game of Nomic. The new home of the Nomic FAQ and then Net Nomic Database.
http://www.nomic.net/~nomicwiki

Radio Free Nomic
A PBEM nomic, open to new players, in which Donuts are the currency.
http://www.houseofsin.net/rfn/

Socialnomic
The mailing list necessary to play this nomic.
http://groups.yahoo.com/group/Socialnomic-DML/