Smoothboard Air - Smoothboard Air is a collaborative interactive whiteboard application for iPads and Android devices that revolutionizes interaction in lecture rooms.

OpenBoard - The OpenBoard software is an interactive white board software.

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.

Conceptboard - Instant Whiteboards for Teams & Projects

RealtimeBoard - RealtimeBoard is an online collaboration software created as a team collaboration and online brainstorming tool. It's super easy to use & free!

Scribblar - Scribblar is a free online collaboration tool that is perfect for online tutoring.