Filmmakers for film preservation.
National Film Preservation Board
Board responsible for annually selecting "culturally, historically or aesthetically significant films" for preservation in the Library of Congress' (LOC) National Film Registry. Board also advises the LOC on its national film preservation planning policy. This site includes a link to the films listed in the National Film Registry (film title, year of release, year entered into the Register).
British Film Institute (BFI)
FIAF (International Federation of Film Archives)
Brings together institutions dedicated to rescuing films both as cultural heritage and as historical documents.
International Federation of Television Archives (FIAT/IFTA)