The Academy of Motion Picture Arts and Sciences defines a short film as "an original motion picture that has a running time of 40 minutes or less, including all credits."
Film Critics Pick The Best Short Films Ever Made, via IndieWire:
25 Short Films to Watch on YouTube, via Ranker:
16 Short Films That Launched the Careers of Famous Directors, via Mic:
Best Short Films, via discover.film:
List of Pixar films and shorts, in release order
Animation tests, commercials, and other short clips (
2019-02-12 Added Toy Story 4, Onward, Bao, various SparkShorts, Auntie Edna
Including anthropomorphic animals (ex. Bugs Bunny), and excluding magical humans/humanoids or animals that talk but are otherwise "normal," they have their own lists. I'm always open to recommendations! See https://trakt.tv/users/bangiras/lists/read-me for ways to contact me if you don't have a Trakt.TV account.