Clickable flow chart

Am posting this here in case Suffusion has a feature that will solve my problem. I know there’s lots about Suffusion I don’t understand or use yet.

Does anyone know how to build a flow chart for a WP post or page? I don’t know if any of the Suffusion features would do it, if there is a plugin that will do it or is there another way.

I want some text in a box at the top.
Probably arrow down to another text box. Have a link in that box to take me to another post/page with some background information. And I’d have a link on that page to bring people back to the flow chart.
Arrows to several text boxes that people will choose between and that each link to individual pages/posts for further information.

And so on.

I thought there’d be a plugin to generate flow charts but can’t find one.

It would take me forever to use html to make text boxes. Let alone trying to lay them out on the page. And I’ve no idea how to generate arrows. Or to make them different shapes.

Is there a free, or cheap program that will generate an interactive flow chart? How do I insert the chart into a post/page?

Thank you