Wikimedia Commons is a website owned by the Wikimedia Foundation, based on a wiki. Anybody can upload images, sounds, videos, and other multimedia files to the website. The files uploaded to Wikimedia Commons can be used by any other Wikimedia Foundation project, like Wikipedia or Wiktionary. For example, Wikipedia uses images on Wikimedia Commons to include pictures in their encyclopedia articles. The files can also be freely used by anyone else because they have free licenses.