Only a few for now....
I don't know about movies out today...but here are a few good ones to check out:
1) "City of God" excellent foriegn drama
2) "Seven Years in Tibet"
3) "The Lion in Winter" old version
4) "A Man for All Seasons"
5) "Cabaret"
6) "Casablanca" worth watching even for one line: "Of all the gin-joints in all the towns in all the world...she walks into mine."
7) "Lawrence of Arabia" long but good
8) "The Bridge over the River Kwai"
9) "Kelly's Heroes"
10) "The Eagle Has Landed"
11) "Cross of Iron"
12) "Das Boot" german u-boat story
13) "Much Ado About Nothing" Kenneth Branaugh version, Shakespeare
14) "A Midsummer Night's Dream" Shakespeare
15) "Full Metal Jacket", "Doctor Strangelove" any film of Stanley Kubrick is excellent
16) "Saving Private Ryan"
17) "Alien"
18) "The Silence of the Lambs"
19) "Seven"
20) "Memento" told backwards, very interesting for first time viewers
21) "One Flew Over the Cuckoo's Nest"
22) "The Big Lebowski" comedy
23) "Fear and Loathing in Las Vegas" comedy, true
24) "Rushmore" comedy
25) "The Nightmare Before Christmas" excellent claymation for kids and adults
26) "Indiana Jones and the Raiders of the Lost Ark"
27) "The Hobbit" 70's animated, great for kids...not so great if you haven't loved it since childhood
28) "The Outlaw Josey Wales" Clint Eastwood as Badass
29) "Million Dollar Baby" Clint Eastwood as Lovably grumpy old guy
30) "Seven Samurai" slow, black and white, in Japanese, and one of the greatest movies of all time by director Akira Kurosawa
31) "Memories" Anime, in Japanese, three short stories, very good
32) "Princess Mononoke" or "Spirited Away" or any by this director--it is anime, but in a disney-like fashion
Note: some people hate anime from the beggining, but if you like it, you might want to check out the series "Cowboy Bebop", "Ranma 1/2", and "Macross Plus"
This list doesn't even begin to cover all the good movies, but it's a start. Tried to Leave out ones EVERYONE has seen.
PS--
33) "Singing in the Rain"
34) "Hero" Kung-Fu drama, a little fantastical
35) "Enter the Dragon" kung-fu classic
36) "Jurassic Park" NOT the sequels