Docuseek Film & Video Finder
Search the collections of 4 distributors: Bullfrog, Rhombus Media, First Run/Icarus, and Fanlight
National Film Board
Watch several hundred NFB films for free online. Most NFB films can also be borrowed from the New Brunswick public library system.
The library has thousands of movies available for two week loan. You can search for them in the Library Catalogue (using "dvd" or "videorecording" as one of your keywords helps to limit your search to just films).