Oooh thanks for the reminder davil! Had been meaning to see Martha Marcy... but never got round to it.
Three time-travel related movies *SPOILERS AHEAD*
I have recently re-watched Primer
www.imdb.com/title/tt0390384/ (for about the 10th time) and it still captivates me. I love how the storyline(s) get increasingly more complicated, as would happen when one starts messing around with time travel. The actors do a brilliant job for total amateurs, though they are playing baffled tech-heads, which is what they really are, so I guess it may not have been that huge of a leap.
In the vein of Primer I also sought out Los CronocrÃmenes (Timecrimes)
http://www.imdb.com/title/tt0480669/. I really enjoyed it but was left wanting. I thought the narrative was far too linear for a time travel movie where *SPOILER* the protagonist crosses paths with himself several times. Also despite some rather emotionally trying events taking place, there wasn't a huge connection to be made with the main characters, especially the protagonist. Much like Primer it starts slow and becomes increasingly dense but the characters are not fleshed out. This is one film where I really am looking forward to the American remake which should be coming out some time this year.
The third is Triangle
http://www.imdb.com/title/tt1187064/. It is very much a B-horror/thriller, straight to dvd, style movie. It stars Melissa George who provides a really good performance I thought. She is seriously put through the wringer and for most of the movie she looks god-awful (in that she is crying all over the place and what not). It struck me as kind of odd at first, but then I realised I'm just used to actresses in movies coming out of pretty much any situation looking rather pristine save from a tactical smear of makeup and ripped clothing. This again is a movie where *SPOILERS* the protagonist crosses path with themselves a few times, and the intersections are far more complex and convincing, I thought, than Timecrimes. There are some ultimately gaping plotholes but I was thoroughly impressed (for a b-grade horror/thriller) at the narrative. It very much reminded me of Ghost Ship in terms of production and... they're both set on ships ^_^