Cacoo is a user friendly online drawing tool that allows you to create a variety of diagrams such as site maps, wire frames, UML and network charts. Multiple users can edit the same diagram in a simultaneous collaboration.
Below is an example, click on the edit icon down of the diagram and modify it. Don’t forget to save. Let ‘s see what it will be 
karim
November 24, 2009 at 12:18 am
Je ne trouve pas l’icone en bas du diagram.
Kristou Mehrez
November 24, 2009 at 9:12 am
It is just below the diagram the 4th from the left.
Fadoua
December 6, 2009 at 2:22 pm
Wonderful! It is not usual to find a Japanese creation in software science with English interface and documentation!
Are you involved in this project?