Below are the six from me....
21 grams: Probably the one movie in the list that actually doesn't deal with after life directly Its only connection is the mysterious 21 grams.
Source Code: If we could right a code to sustain our yearning for life.
Happy Accidents: Love and time travel, life or afterlife you decide.
The Lovely Bones: Looking down from a heaven above - life lost, lives being lived, the play goes on.
Five People You Meet in Heaven: This review is of the book, but the movie also has the same name and can make you teary eyed the way only a Mitch Albom creation can.
Ditto(Donggam): Kind of like the Lake House(in the list below), Korean with younger actors.
and the five from IMDb
Flatliners: I was bowled over by the doctors experimenting with dying when I saw it twenty years ago.
Sixth Sense - M. Night Shyamalan had arrived and you began to see dead people.
Abres Los Ojos or Vanilla Sky - Illusion and reality, life and death.
What Dreams May Come - The one film that directly deals with afterlife and shows you what it might be like.
Lake House - Communicating across time beating the life-death cycle at its own game.
and the three I want to watch.
Wristcutters : A Love Story
Enter the void