Graphviz is a classical open source code and a core building block of many contemporary data science codes. There exist bindings in virtually any programming la

Graphviz is a classical open source code and a core building block of many contemporary data science codes. There exist bindings in virtually any programming language and the software is by no means outdated, despite there are more fancy, maybe more interactive tools for graphing. Or niche products for visualizing extremely large graphs, for instance. Just to give an example, GraphViz does a great job at SVG rendering in an Ipython/Jupyter browser based notebook.