I have previously commented on xtranormal.com which enables you to create a movie by complex scripting of words and actions. A much more simple movie maker is Devolver Moviemaker users can add backgrounds, select characters and write text to be displayed in speech bubbles for the characters. In this software you can select from limited movement but it is very simple to use. The simplicty could make this a fun tool, particularly for students learning a language, wishing to display their skills or knowledge in a fun way.
These films can then be emailed or embedded in a website or blog. Below is a very simple one to indicate what they can do.