Back in 2010, we posted about a Star Wars Crawl Creator you could use for fun. It doesn't look like you can easily download or export the crawl video when you are done, but it was still fun.
Soon afterwards, Foley Productions commented about a free iPhone / iPad application that lets you create the crawl and actually save it as a video. Checking back into it today, I've found that they have released a free version of Crawl Creator. Do you have an iOS device? Go have fun with it!