Scream (1996): Directed by Wes Craven; Starring: Neve Campbell, Courteney Cox, David Arquette
Scream redefined the slasher flick and gave itself a new life and new generation. A great example of 90's teen movies as well.
The Texas Chainsaw Massacre: The original 1974 version AND the 2003 remake. Both are worth watching.
Saw (2004): Directed by James Wan; Starring: Cary Elwes, Leigh Whannell, Danny Glover
One of those gratuitous violence kinds of movies. The traps, the blood, the gore, they're all scary, but the truly terrifying thing about this movie is the mind that came up with the scenarios and devices. I mean, how twisted can someone be?
Black Christmas (1974) : Directed by Bob Clark; Starring: Olivia Hussey, Margot Kidder
Watch the original, not the remake. Trust me.
Disturbia (2007): Directed by D.J. Caruso; Starring: Shia LaBeouf, Sarah Roemer, Carrie-Anne Moss
It's basically a rehashing of Rear Window but with teens. Tension, bodies in the basement, Shia Labeouf, what a great combination.
American Psycho (2000): Directed by Mary Harron; Starring Christian Bale, Chloe Sevigny, Reese Witherspoon
Wonderful performance from Christian Bale (as usual) elevates this slasher to a character drama.
Child's Play (1988): Directed by Tom Holland; Starring: Catherine Hicks, Chris Sarandon, Alex Vincent
I must have caught this on TV when I was a kid, because I remember having the worst nightmares about it. I couldn't trust my stuffed animals for weeks.
Friday the 13th (1980): Directed by Sean Cunningham; Starring: Betsy Palmer, Adrienne King, Kevin Bacon
The original, none of the follow ups. You really can't do better as far as true slashers go. Ok, maybe Halloween.
Halloween (1978): Directed by John Carpenter; Starring: Donald Pleasence, Jamie Lee Curtis
Honestly, not my favorite slasher, but still, it's pretty awesome.
The Hills Have Eyes (1977): Directed by Wes Craven; Starring: Susan Lanier, Robert Houston
Creepy creepy creepy
The Hitcher (2007): Directed by Dave Meyers; Starring: Sean Bean, Sophia Bush, Zachary Knighton
There's a tremendously inventive/grody death scene in this one. It's one of the few things I remember about the movie.
I Know What You Did Last Summer (1997): Directed by Jim Gillespie; Starring: Jennifer Love Hewitt, Sarah Michelle Gellar, Ryan Phillippe, Freddie Prinze Jr.
Another classic 90's teen slasher.
Last House on the Left (1972 AND 2009)
The 2009 version deviates a bit, but it's a good addition to the list. Some might not be able to take it though, so viewer be warned.
A Nightmare on Elm Street (1984): Directed by Wes Craven; Starring: Heather Langenkamp, Johnny Depp
Again, the original, none of the follow ups. Inventive and amazing shots.