@debacle @bbatsov I managed to somewhat make it work with `org-babel` so yes, it can be integrated in Emacs.

I would gladly create a package for this but I have no idea how and where to start.

Org Mode

@AAMfP because when I looked up how can I insert a diagram in org-mode, #GraphViz seemed simpler to me than #PlantUML, and I sort of got stuck with it. But thank you for the suggestion. @debacle @bbatsov
@RePierre @AAMfP @debacle @bbatsov if I remember right, I just needed to point Emacs to the plantUML JAR and add the language to Babel. Other than me not knowing plantUML, it works pretty well.