PlantUML has morphed into a two part tool. Its original purpose was to visualise various forms of UML diagrams. More recently it has utilised its underlying gr

PlantUML has morphed into a two part tool. Its original purpose was to visualise various forms of UML diagrams. More recently it has utilised its underlying graphviz to create a more general 'graphviz on steroids' diagramming tool (referred to as the PlantUML standard library). The original UML diagrams can be styled to look modern, but normally are shown in a default slightly old-fashioned and uninspiring visual style. Such a shame if that's your impression. As mdaniel posted, just a refresh of the colour scheme can modernise the look of UML diagrams https://real-world-plantuml.com/umls/4831648155697152 https://real-world-plantuml.com/umls/4831648155697152 The second part covered by this hitchhikers guide shows a modern take on visualising component relationships. Both parts allow visualisation as code, but otherwise have different purposes. I wish we'd see more UML examples in a modern style. (I'd also recommend MarkDeep for documentation. Includes these + markdown, math, doxygen integration and more)