Is there any emacs mode that will give me a list of my open buffers as a tree? By tree, I mean a directory tree, where buffers are grouped together if they are visiting files that reside in the same directory.
In vanilla emacs, or even icicles mode, the views I have seen of the buffer list have all been flat. A tree view would help me more quickly make sense of which buffers are open and the relation between them.
Possibly a bit heavyweight for what you want, but have you looked at Project Buffer Mode?