YouTube's response to Vine & Instagram, MixBit allows you to shoot, edit, and post video from your mobile device. Technically an iPhone/iPod app, it would work on iPad.
I'm not quite sure how this works yet, but you can somehow use this when combined with Creative Book Builder to make something else...I need to play more for it to make sense.
Cork board type app that allows students to organize research or a project on their ipad. The free version allows for one board. Online, collaborative version would be Wallwisher