Automatic flowchart tool [closed]

Answer 1

Very basic tool graphviz does all the layout for you.
Example:

graph g {
  node[shape=rectangle]
  a--b
}

Draws this:

But there are plenty of other options, shapes, etc, you can try here: http://sandbox.kidstrythisathome.com/erdos/

EDIT: for WISIWIG editor look here: Is there any good IDE or WYSIWYG editor for graphviz?

Looks like http://www.pixelglow.com/graphviz/ is the best option.