Graphviz is excellent. I use it for (amongst other things) generating diagrams of states and transitions, and also for automatically mapping choices as I write

Graphviz is excellent. I use it for (amongst other things) generating diagrams of states and transitions, and also for automatically mapping choices as I write interactive fiction. More generally I've added it to Newt [1], which is my in-progress C# code generator. It scans a PostgreSQL database to automatically generate a class library with models and EF Core data contexts. As part of that it writes out a dot notation Graphviz source file for showing the tables and relationships. The repo includes an example image [2] - it only shows a couple of tables, but it gives an idea of what can be produced (and also shows the .dot source file that was created to produce it). [1] https://github.com/kcartlidge/Newt https://github.com/kcartlidge/Newt [2] https://github.com/kcartlidge/Newt#created-graphviz https://github.com/kcartlidge/Newt#created-graphviz Edit: If anyone does C and has skills or money available (I don't) the Graphviz README says "This project has only 3 of its founders remaining as volunteer maintainers, and support is limited and may end soon. If you can help fund to a more formal foundation to continue this project, please contact north on graphviz org."