This is a great little ipad app which I spotted shared by a friend on Facebook. I had seen it before but it was on my list of things to look into further and her post helped to jog my memory to do that.
Post it Plus turns an image of post it notes gathered as part of a class discussion, exercise, Q&A or whatever into digital post it notes. How cool is that? They can then be used again, shared for use on one of the many virutal desk tops/whiteboards that there are available now or just shared with the group as an aide memoire or jointly constructed class notes also other users can add to the notes so useful for students who were not at a session or who may think of something later.
Follow THIS LINK for more info and a short video demo.