Though not free ($1.99), this is almost like an entry level screencasting app where students draw and then tell the story about their drawing. Completed projects can be shared.
In addition to being able to use the Fotopedia Reporter from the web, there's now an app. Choose from thousands of public domain images to create and share digital stories.
This is a free app that is similar to iMovie. For an additional $.99, you can have full capabilities of adding photos, music, voice over, and transitions.
This is an interesting app that seems to be a cross between Fotobabble and Animoto. The idea is that you can record ambient sound while taking pictures in order to create a short video. Could be an interesting way to document field trips or create a digital story.
This app is free until April, though know that some content becomes an in-app purchase. Bookabi allows students to create their own storybooks with 2D and 3D characters. They can upload their own photos and pictures plus save and share their final projects.
This is one app that almost fully replicates the online version. The mobile version of VoiceThread leverages the built-in capabilities of the device to easily create new projects.
Animoby is a sort of screencasting tool, but not really. The idea is to instantly create and publish products that include voice, drawings, and images.