Alan Levine at CogDogBlog has developed a nice page of online storytelling resources.  You can find most (and probably more) of these same tools on my Examples of Student Work page.

However, Alan’s page is much better organized and attractive.  It’s geared towards providing ideas and information to teachers.  Mine is more focused on students directly using the page.

The other great thing about Alan’s page is that he tells the the same story about his dog using many of the tools.  Looking at the many versions really gives you an excellent idea of the differences between the applications.