It's hard to make me cry these days, so anything that manages instantly gets better in my book.
From what I remember now it was definitely Haibane Renmei, Ping Pong the Animation, Top wo Nerae! Gunbuster, Houseki no Kuni, Monogatari Series, Kyousougiga, Tsumiki no Ie and several Shinkai movies. Also Lucky Star, because of nostalgia and lots of regret piled up.
Might also have cried during Shoujo Kageki Revue Starlight and Tatami Galaxy, but I'm not sure.