There are a lot of gems to be found on archive.org - mostly forgotten films that no longer have a copyright and are in the public domain. The Man Who Cheated Himself is one of the best there!
Not only does it star my favourite actor Lee J. Cobb, it's a bona fide hidden noir gem. Bad cops, double crosses and illicit affairs - what's not to like?
Download the entire film for free at archive.org!