Collaborative Drawiing

Imagination Cubed is an online white board that has drawing tools so you and your friends, colleagues, team mates, can create together in real time. While the tools are rather primitive, they can be used by many at the same time on the same document. Work can be saved and sent to a friend, but not to disk.

Good Points:

Has pens, stamps, shapes, lines, and text as well as background options.

Can work across platforms and even with older OS both Mac and Win.

Replay option which shows the drawing being created.

FREE

Difficulties:

Not easy to see the canvas boundaries unless you put in a background color first.

Not possible to actually export the drawing, though you CAN do a screen shot to save.