Some notables for me.
Forrest Gump: The part where he is talking to her at her grave.
Big Fish: The scene where they are in the bathtub together and the ending.
My life: When Keaton's dad shaves him. Holy [censored].
About Schmidt: The end with Jack and the letter.
Glory: Various parts.
Gladiator: The end when his friend buries the little statues and sdays he will meet again.
Barbarian Invasions: Ending up at the cabin.
Dad: Various parts.
To Gillian on Her 37th Birthday : Dont know if anyone has heard of this movie. The plot sounds kind of goofy, but I found it terribly sad.
Philadelphia: Ending in the hospital.
Nothing I've ever seen though made me cry more than the ending of the series finale of Six Feet Under. Wow.