SMiki was a German-language wiki project BDSM and fetish encyclopaedia, now defunct. In March 2010, it had 1,500 articles. There was also an English language version, but it was deactivated at the beginning of 2009. Their Commons site, hosting photos that could be used on both the German and English sites, has also disappeared.
Like Wipipedia, it was free and the general public was encouraged to take part.