SyncSpace is a collaborative whiteboard app that I recently featured on my other blog Android 4 Schools. Since writing that post, I've had a couple of people ask if SyncSpace is available for iPads. The answer is yes. You can get the SyncSpace app for iPad here and the Android app here.
You can use SyncSpace to create drawings and documents on your tablet. You can create using free-hand drawing tools, using typing tools, or a combination of the two tool sets. Your drawings and documents can be sent to and synced with other users so that they can comment and edit your drawings and documents. Learn more about SyncSpace in the video below.
Applications for Education
SyncSpace could be a great app for collaborative brainstorming sessions across multiple devices.