features a short list of classic films (from 1916-1949) available online
The entry cites Open Culture, which maintains a longer list of classic and contemporary films.
This will prove to be a great resource on those nights when TCM and Netflix don't have what I'm in the mood for.
(image from The Los Angeles Conservancy: "Broadway and Ninth Street, with United Artists Theatre on left, circa 1930s. Photo from Conservancy archives.")