Whats the name of the movie where teens go camping in a forest and they get killed by a grim reaper i think?

and theres this other movie where a guy gets stalked in a phone booth where he was called by an anonymous person and hes trying to kill him and the victim’s name was stew. and theres this other one where ghosts appear on their computer. like, do you want to meet a ghost? stuff. please answer. ;)