My brother shared a video on facebook today. It was an interesting video, interesting enough that I checked out the webpage displayed at the end. The webpage wasn't about the video specifically, it was the page used to create the video.
It looks like this could be kind of fun. They say, "If you can type, you can make movies" so I'm looking forward to trying it out. It looks like you choose characters, choose a background, and write your script. After that, I'm not sure because I haven't had time to try it - but I'm linking to it here so I can play with it in the future.
Xtranormal - Text-to-Movie - there's a downloadable version and a web version. Both are free, but there are some premium features you can pay for, if you want more.