[andreareina]

ditaa[1] for ascii art, Graphviz[2] for node-and-edge stuff, PlantUML for the rest

[1] http://ditaa.sourceforge.net/

[2] https://graphviz.org/

[ngcc_hk]

Use graphviz as well. That look very verbose. Btw learn graphviz via the lisp one game at a time.

[andreareina]

Land of Lisp? I don't remember if that's how I came across graphviz, but it was my introduction to generating svg.