The Wikimedia Foundation,a non-profit organization managing a number of collaborative projects, including Wikipedia, the free encyclopaedia, announced on November 30 that Wikimedia Commons, it's collaborative media repository, has reached one million files.
All content on Wikimedia Commons is either in the public domain or licensed under free licenses that let anyone use the files, provided some simple conditions are met (usually crediting the author and publishing any derivative works under the same license).
Read more in Wikimedia Foundation's press release.