Not like the example you've given, but for well designed and easy to configure diagrams that can be saved or exported in plain text (e.g. for use in documentati

Not like the example you've given, but for well designed and easy to configure diagrams that can be saved or exported in plain text (e.g. for use in documentation, websites or markdown) I use Monodraw: https://monodraw.helftone.com https://monodraw.helftone.com For graphical diagrams I use yEd or occasionally draw.io for quick and simple graphical flow charts (online or offline as a gross javascript web frame - but it works well enough and it's free).