Senses of Cinema has an article. The British Film Institute has a short bit and links to other resources here. FilmReference.com closes its article by saying,
All through his life, Lang adjusted his talent to meet the changes in his environment, and in so doing produced a body of creative work of unquestionable importance in the development of the history of cinema.
Metropolis, M and Destiny are available for viewing online at those links.
Woman in the Moon (1929 silent):
Scarlet Street (1945):