Drawing cool Graphs Quickly

In the process of working out how to sketch the knowledge for my DH talk in Zagreb, I found a Graphviz website that allows one to experiment with the DOT material immediately.

WebGraphviz has a type-in box for the graph description and a display area below where a simple click of [Generate Graph] will output the results. I usually keep the DOT Language Guide close at hand in the adjacent tab. GraphViz supports such a rich set of output formats, but unfortunately, Google Slides (nor Blogger) will not handle SVGs correctly ... :P

Here a rather sizeable graph from my presentation for Zagreb.