The Loyal Order of the Water Buffalo

An elaborate parody of fraternal organizations.
http://www.loyalorderofthewaterbuffalo.com/

The Holy Order of the Lemon

Fictional organization that parodies the Loyal Orange Order. Includes a fictional history, manifesto, photographs from the inauguration, and links to sites about lemons.
http://www.hellshaw.com/lemon/

Fraternal Order of Wellington

Humorus secret high-school order with a grudge against France, things French, and some local kids.
http://fowellington.tripod.com/