Draw.io: Online Diagramming Website
I've tried drawing diagrams with these tools and it seems so much harder for quick drafting than just using pen and paper and also a lot of work to get anything even remotely good looking (like aligning things or making boxes of the same size, ie performing mass operations).I would like to use a tool where I first describe the relations in text/code and the layouting and formatting is done separately, and formatting should be hierarchical.