NoteBookCast is a free whiteboard tool that will work in the web browser on a laptop, iPad, Android tablet, and Windows tablet. NoteBookCast is a collaborative whiteboard tool. You can invite others to join your whiteboard by entering the code assigned to your whiteboard. You can chat while drawing on NoteBookCast whiteboards. In the video embedded below I demonstrate how to use NoteBookCast.

Applications for Education
NoteBookCast could be a good tool for students to use to remotely work together to solve problems, create mindmaps, or tutor each other.