d2

D2 is a modern diagram scripting language that converts textual definitions into visual diagrams, aimed primarily at developers and technical documentation authors. Its notable features include a user-friendly CLI for live-reloading SVG outputs, customizable themes, and extensive support for plugins, making it versatile for various diagramming needs. D2 facilitates quick creation of complex diagrams with a simple syntax, catering to a wide range of use cases from network layouts to architectural designs.