Vim comes with some support (syntax highlighting) out of the box for the DOT language (graphviz)
In addition, I found the plugin: https://github.com/wannesm/wmgraphviz.vim, which provides integrated compilation and interactive viewing. Furthermore, this is the only plugin that I could find providing graphviz support.
I am coding up a complicated graph and ideally, I'd like to have a bit more advanced support, particularly linting, autocompletion and snippets.
Is anyone aware of tools that do this?