SMiki
From wipipedia.org
SMiki is a German-language wiki project BDSM and fetish encyclopaedia. In March 2010, it had 1,500 articles. There is an English language version, but at the beginning of 2009, it was deactivated. Their Commons site has disappeared.
Like Wipipedia, it is free and the general public is encouraged to take part.
The encyclopaedia covers methods, special interests (body modification and fetish), toys and furniture.