Wikipedia
Bitzi
Bitzi was a website, operating from 2001 to 2013, where volunteers shared reports about any kind of digital file, with identifying metadata, commentary, and other ratings.
Information contributed and rated by volunteers was compiled into the Bitpedia data set and reference work, described by Bitzi as a "digital media encyclopedia". The Bitpedia was published through the Bitzi website and web services under an open content license ( Creative Commons Attribution - Share Alike 2.0).
Bitzi's standards and services have been adopted by a number of popular peer-to-peer file sharing systems. Bitzi was sponsored by a metadata publishing company of the same name based in San Francisco.