Internet Movie DataBase:
http://www.imdb.com
A really amazing and exhaustive site with extensive information on just about everything related to the craft, the people and film history.

Classic Celluloid:
http://www.geocities.com/Hollywood/Hills/4337/index.html
Provides information on British film, as well as silent film and much more.

Screen Site:
http://www.screensite.org/
ScreenSite emerged from a desire to provide access to film and television resources through the World Wide Web. Its primary purpose is to facilitate the study of film/TV. As opposed to some Web sites that take more of a fan's approach to the media, ScreenSite stresses the teaching and research of film and television and is designed for educators and students.

Film Research
http://www.library.rochester.edu/index.cfm?PAGE=332#websites
Provides links to specialized catalogues, bibliographies, institutes, dictionaries, newspaper reviews and much more.

Forum for Psychoanalytic Study of Film:
http://www.cyberpsych.org/filmforum/
An international interdisciplinary organization that provides opportunities for people interested in psychoanalysis and film to exchange ideas via screenings, conferences, a magazine and projections.

Postcolonial Cinemas:
http://www.mtholyoke.edu/courses/aamkpa/postcolonial-cinemas/
An online course and set of resources devoted to the History and role of film in countries that were once colonies.

Cinema History:
http://www.tc.umn.edu/~yahnk001/film/cinema.htm
Robert E. Yahnke at the
University of Minnesota provides a brief but handy history of film at this website.

Internet Movie Database: Today in Movie History:
http://us.imdb.com/M/on-this-day
Information on what was what and who was who in the movies on any day in History since 1900.

Box Office Statistics:
http://www.vex.net/~odin/Gross/
You can find out what films earned starting in the year 1900 here.

Image Bank
http://www.theimagebank.com/
An extensive online database of stills and film clips.

Classic Movies
http://classicfilm.miningco.com/ 
About.com's classic movies page.

The Film 100
http://www.film100.com/
A ranking of the 100 most influential people in the history of cinema. Contains a large collection of biographical information, film studies, interactive demos, and web links.

Association of Moving Image Archivists
http://www.amianet.org/
An organization for individuals concerned with the collection, preservation, exhibition and use of moving image materials.

Film Sound Theory
http://filmsound.studienet.org/
Essays on film sound theory and technology.

The Widescreen Museum
http://www.widescreenmuseum.com/
The history of widescreen cinema, with explanations of various formats and their development.

News and Views
(http://www.mhhe.com/socscience/art-film/news.htm)