[pcsanwald]

Were the diagrams done with software, or hand drawn? If software, I'm curious what package/style you used, the style looks very similar to Martin Kleppmann's presentation at StrangeLoop; I assumed his were hand drawn but I'm realizing now this might be a omni style or something.

[optimusclimb]

This always comes up with Martin Kleppman diagrams. See this discussion:

https://news.ycombinator.com/item?id=9613118

The bottom comments seem to agree it was done using Paper.

[twic]

From the Kleppmann's mouth:

https://twitter.com/martinkl/status/629169643710775296

I saw him talk at a conference, and that was one of the questions someone asked. He must be so fed up with it by now!