Wikidata
Wikidata is a collaboratively edited multilingual knowledge graph hosted by the Wikimedia Foundation. It is a source of open data released under the Creative Commons CC0 public domain dedication. It is for the use of both Wikimedia and external projects. Launched in October 2012, it is developed mainly by Wikimedia Deutschland and supplies the interlanguage links and some of the infobox data used by Wikipedia and other Wikimedia projects. Wikidata is a wiki powered by the software MediaWiki, including its extension for semi-structured data, the Wikibase.