Scrib LINK is a free online whiteboard that you could use to collaborate & run discussions & meetings online .
It comes along with free video conferencing & an accompanying online chat client too.
Scrib Link is a free digital collaboration tool & can be used to run group discussions like layout planning, concept diagramming, or tutoring a friend in math! This is a great free tool to run online meetings for small home based businesses .
Scrib Link is free and requires no registration. If you have a kids at home, you could run an online drawing competition with all of them on the board at once!