Slack - A messaging app for teams who see through the Earth!
Idea Paint - Create a usable, interactive space on any flat surface
Smoothboard Air - Smoothboard Air is a collaborative interactive whiteboard application for iPads and Android devices that revolutionizes interaction in lecture rooms.
Microsoft Whiteboard - The canvas where ideas, content, & people come together.
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.
Walls360 - Amazing wall graphics