DrawPile - Drawpile is a drawing program that lets you share the canvas with other users in real time.

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

Aggie.io - Draw a picture together with your friends in real-time over the internet in your browser.

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.

malmal - Draw together on a nearly infinite canvas with your friends or with strangers.

RM Easiteach - RM Easiteach is a brand new and a trendy interactive program for your classroom, for use on any whiteboard, projectors and other hardware devices.