Project homepage: https://github.com/jorgenschaefer/circe/wiki

Sources: https://github.com/jorgenschaefer/circe

Circe is a Client for IRC in Emacs. It integrates well with the rest of the editor, using standard Emacs key bindings and indicating activity in channels in the status bar so it stays out of your way unless you want to use it.

Complexity-wise, it is somewhere between rcirc (very minimal) and ERC (very complex).

Make sure you have marmalade added to your package sources. To your .emacs, add this:

(require 'package)
(add-to-list 'package-archives
    '("marmalade" .
      "http://marmalade-repo.org/packages/"))
(package-initialize)

Then, use package-install to install Circe:

M-x package-install RET circe RET

After this, M-x circe should work.

Download the latest stable version from https://github.com/jorgenschaefer/circe/downloads

Unpack the tar.gz and add the circe-X.Y/lisp/ directory to your load-path like so:

(add-to-list 'load-path "~/.emacs.d/lisp/circe-X.Y/lisp")
(require 'circe)

The next time you start your Emacs, you should be able to use M-x circe to connect to IRC.

In a shell:

mkdir -d ~/.emacs.d/lisp/
cd ~/.emacs.d/lisp
git clone git://github.com/jorgenschaefer/circe.git

Then add the following to your .emacs file:

(add-to-list 'load-path "~/.emacs.d/lisp/circe/lisp")
(require 'circe)

The next time you start your Emacs, you should be able to use M-x circe to connect to IRC.

Please see the Wiki for further information:

https://github.com/jorgenschaefer/circe/wiki