Any suggestions? Mac or cloud computing based? And free?Im looking for something free like OmniGraffle, but free. Does Dreamweaver having anything similar inside of it to rough out or think out sites?
Pen & Paper is my usual choice. But for wire framing and flow charting in a collaborative environment, you may like ProtoShare. It's not free but they offer a 30-day free trial. Watch the video to see how it works.
Strom Flow Chart Software for Mac OSX (shareware priced at $24.95)
Gliffy On-Line Free Flow Chart Software
My suggestion for you to use a web based flowchart solution since it is platform independant. If you are using windows, there are plenty of softwares out there. But if you are using Mac and Linux i suggest you to buy a flowchart software or use a online flowchart software like creately.