I am not sure how many if any of you have heard about Stephen King's Dollar Babies. Basically Mr. King has several short stories that he is willing to allow student filmmakers to adapt a script from. You pay him $1 for the rights to do this. However the film can not be use for commercial gain. It is basically for demo reels, film festivals or school projects. You are only allowed to show a total of 2 minutes of the film online via channels such as Facebook, Youtube etc. As with anything you have to pick a story and write Mr. King to get his permission to adapt the film.
Information can be seen at Dollar Baby - Wikipedia, the free encyclopedia
The list of the short stories that can be adapted can be seen here:
StephenKing.com - Dollar Babies
Good luck and happy filming,