Google Docs for visual people.
The easiest way for creative teams to think, imagine and discuss their ideas.
|Starter||$29/month||Includes 3 users. Self-service support.|
|Garage||$99/month||Includes 7 users. Email support.|
|Studio||$299/month||Includes 15 users. Email support.|
|Business||$1099/month||Includes 50 users. Priority support.|
I am afraid it is not free anymore?
Great online visual collaboration tool. Free.