With Loupe (free) you can group photos into a shape--this has potential for students to demonstrate knowledge on specific topic. You can enter text as well.
Upload photos, record voice and share...free. Again, I see potential for publishing--could have book reviews, commentary and more on classroom webpage.
"Fast layout and customisation of photos, video, text and music.
Add media hotspots, narrate interactivity. Publish to any webpage" Lots of recommendations, many of which are in RWL 513.
New audio tool for iPads--Adobe Voice. Looks very easy with some options (e.g., royalty free music, add photos), but you have to email or embed--you can't download.