Ask HN: What diagrams do you use in software development?

There's currently an article on the front page about the death of UML[2]. While UML's inheritance diagrams have been dead to me for a long time, I still like the sequence diagrams.

Besides that I sometimes still draw ERDs and I love JJG's Visual Vocabulary[1] for drawing "interaction diagrams".

What types of diagrams do you use with your team?

[1]: http://jjg.net/ia/visvocab [2]: https://news.ycombinator.com/item?id=26934577