the comments here https://news.ycombinator.com/item?id=45742907 https://news.ycombinator.com/item?id=45742907 have some discussion about projects that take a "f

the comments here https://news.ycombinator.com/item?id=45742907 https://news.ycombinator.com/item?id=45742907 have some discussion about projects that take a "focused algorithm for various different diagram types" approach vs graphviz's one size fits all approach. worth checking to see if any of them do venn diagrams.