Running Shells in Emacs: An Overview | Mastering Emacs

If you use Emacs as your shell you will have all the functionality that Emacs provides plus you get almost all of the advantages provided by the shell itself, but built into Emacs. This article is only a quick overview of all the shells: I plan on tackling each one, in-depth, later on.

Nice overview, I hadn't heard of several of the more advanced shell modes.