Mainstream cinema
Black Film Archive
Guide to finding Black films via streaming services; seems to be limited to US films at present.
European Film Gateway
Portal to 34 film archives across Europe. Link through to some resources which are available for viewing online.
Internet Archive: movies
Classic films to watch online.
The Militant Image
Reading list prepared by iniva.
Scripts
Large collection of scripts from movies, mainly mainstream.
What is My Movie
Useful search engine if you can't remember the name of a movie. Type in whatever you can remember about it, and it will search.