I've been experimenting with many of them and PlantUML is the best one I've used so far. It has a great feature set, and a lot of ways to define different alig

I've been experimenting with many of them and PlantUML is the best one I've used so far. It has a great feature set, and a lot of ways to define different alignment and styles of the diagrams. There's also some interesting projects on GitHub for generated PlantUML diagrams, including this one: https://github.com/thibaultmarin/hpp2plantuml https://github.com/thibaultmarin/hpp2plantuml