IDroo - A shared whiteboard for use by multiple Skype-users simultaneously. Features
Conceptboard - Instant Whiteboards for Teams & Projects
Scribblar - Scribblar is a free online collaboration tool that is perfect for online tutoring.
OpenBoard - The OpenBoard software is an interactive white board software.
Board800 - Board800 is an interactive whiteboard application which uses Red5 as the back-end media server, and...
Groupboard - Free collaborative online whiteboard, web conferencing and online tutoring software that can be embedded in your own website. Used by many online tutors, schools and universities.