title: tool to generate flow chart diagram from textual notation
body: <p>I am looking for a console-based tool that can process a simple text file containing the textual notation of  a flowchart diagram and generate a PNG (or other format) file. There might also be a LaTeX package for that but, if possible, I would prefer a tool that can generate an independent PNG which I can then import in a LaTeX document as a graphic.</p>