Below are the slides for a talk I gave at IQSS about software tools that generate diagrams. Two examples are shown – GraphViz and PlantUML.
I was hoping to show that focusing on the semantic level of the diagram (e.g. structure, relations) and letting the computer decide on the actual layout can make life easier. I know I use these tool quite often.

Anyway, the slides are below. The files for most diagrams can be found here.