Before the new Dawn of the Dead, before the Day of the Dead, before the old Dawn of the Dead, there was the Night of the Living Dead. Now available for download! Legally! Free! Creative Commons license: Public Domain

http://www.archive.org/movies/details-db.php?collection=feature_films&collectionid=night_of_the_living_dead&from=collectionSpotlight

via BoingBoing