Witeboard: Collaborate Online
Witeboard is the fastest way to collaborate real-time with your team or with your clients anywhere. You can draw and brainstorm with your team online. The minimalist interface allows you to start instantly. No need to register or login. Just head to witeboard.com and start drawing online on the virtual whiteboard. 
The beauty of this simple, easy interface is that it is cross-platform and allows anyone with any device to join the collaborative session—one person can be on Windows, another on a tablet and the third person could be on a smartphone.
You have tools like: Pencil, Text, Eraser and Undo with Drawing of Rectangle, Circle and Straight Lines, all built in with easy-to-remember shortcuts.
This could be a very useful tool to collaborate interactively and also be shared on Zoom during presentations.
Free Helpline
Legal Credit