Sneffel

Sneffel is a free site for creating a real-time collaborative whiteboard. This site reminds me a lot of Concept Board or Board 800 where a user creates an online whiteboard and then invites others via a unique URL. Another nice feature is the ability to embed the board into a site/blog.

View the brief demo below...

I recommend checking out Sneffel by clicking here!!

FYI, the site is no longer being supported by the developer so tech support would be hard to come by if at all.