Great thread!
Here's some of my favourites:
Movies:
From the canonized ones, DOUBLE INDEMNITY, SUNSET BOULEVARD, LAURA, KISS ME DEADLY, TOUCH OF EVIL, and OUT OF THE PAST are my favourites.
From the rest (most already mentioned):
-The Killers - I'm a big fan of Burt Lancaster noirs generally, and this is the best. One of the films that best summarises noir fatalism.
-Murder My Sweet - One of the best Chandler adaptions in my opinion.
-Nightmare Alley - Only saw this recently. So cynical and pessimistic, a real gut-punch of a film that's like Elmer Gantry meets Jim Thompson. I need to read the book since I hear it's even more brutal.
-Mildred Pierce - Okay it's as much a melodrama, but I fucking love this film.
-Riffifi, Thieves Highway and Night And The City - The best 3 Dassin films I've seen. Perfection pretty much.
-Jean Pierre Melville films - While he didn't just make crime films, his run of them is great (Bob le Flambeur, Le Doulos, Le Deuxieme Souffle, Le Samourai, Le Cercle Rouge). Unparalleled.
-LA Confidential - Best '90s noir film.
-Underworld USA - Sam Fuller films always have an oddness about em. Great revenge flick this one.
-Fritz Lang noirs - All worth a go, from good to great. Fury, Human Desire, The Big Heat etc. M is my favourite Lang though, and has enough noir elements to include here.
-Experiment In Terror - Such an effective psycho-killer neo-noir from the early 60s.
-This Gun For Hire - Probably inspiration for Le Samourai, one of the best 'hitman' noirs (Blast of Silence and Murder By Contract being other good ones that spring to mind)
-Gun Crazy and They Live By Night - Already discussed, both so good, included together because of the Bonnie & Clyde elements shared.
-Sweet Smell Of Success - I doubt this can be included, but since it's so good I'm including it anyway. Same goes for Ace In The Hole.
-Asphalt Jungle and The Killing - Included together as Sterling Hayden heist movies, doesn't get any better!
-In A Lonely Place - If I had to choose one Bogart, this is the one.
-Narrow Margin - Best train-set noir, so fast-paced.
-Les Diaboliques - Again, not really noir, but what a fucking film.
-The Third Man - Simply one of my favourite films in general. Love all the slightly warped framing. Put Odd Man Out here too.
-Lift To The Scaffolds.
Honourable mentions to Pick-Up On South Street, The Big Knife, and The Unsuspected. There's lots of other good stuff but I'll end it there...And that's not including '70s 'neo-noir' stuff (Long Goodbye, Night Moves, Klute etc). Also no Hitchcock (if included I'd put VERTIGO).
I could happily watch noirs all day. Even a solid second-tier effort is enjoyable, like Kiss Of Death which I watched the other day - Sidmark great in his first role as a psychopathic killer, plays it like The Joker.
Books:
James M Cain - Everything. Guy wrote with such a fast-paced narrative even when there's no 'action'.
Chester Himes - A Rage in Harlem. Need to read more by him.
Dave Goodis - Down There. Actually read this based on a recommendation on this board, prior to seeing Shoot The Pianist. Really excellent.
Ethan Coen - Gates of Eden. I was so surprised by how good this short-story collection is. Each one reads like a potential Coen Bros noir film. Highly recommended.
Greene - Brighton Rock. I'm a massive Greene fan anyway (Heart Of The Matter is my favourite), and his crime books are excellent.
Alfred Doblin - Berlin Alexanderplatz. True, it isn't a noir per se but it's got enough elements to appeal to fans of the genre. One of my absolute favourite novels, and I finally just got the Fassbinder 15-hour film version on dvd.
Jim Thompson - Everything.
Ross Macdonald - Everything. As reliable as Chandler, even if not QUITE as good. The 2 film adaptations with Paul Newman in actually aren't bad.
Eric Ambler - Journey Into Fear, Mask of Dimitrios etc. Read quite a few Ambler, like a more fast-paced Le Carre; more spy-Cold War based cynicism but again enough noir elements. Plenty of ok film adaptions that don't match the books.
This thread has given me loads more recommendations, cheers!