1. Kerproof (http://www.kerpoof.com/) It is an interesting site. You can create a story or a movie. there are other features in the site. It is nice to check it out.
2. Abcya (http://www.abcya.com/animate.htm) Animation site, it requires drawing skills.
3. DigitalFilms (http://www.digitalfilms.com/) Filming animation.
4. Jing (http://www.techsmith.com/jing/) You are able to capture images from your computer and it will generate a link so you can share with anyone you want. It is possible to create videos too, but you would need to get Jing pro
5. DoInk (http://www.doink.com/) It is a vector editor that enables you to create videos.