Emacs is the extensible, customizable, self-documenting real-time display editor. Emacs has special code editing modes, a scripting language (elisp), and comes with many packages for doing mail, news and more, all in your editor.

    * Content sensitive major modes for a wide variety of file types, from plain text to source code to HTML files.
    * Complete online documentation, including a tutorial for new users.
    * Highly extensible through the Emacs Lisp language.
    * Support for many languages and their scripts, including all the European ``Latin'' scripts, Russian, Greek, Japanese, Chinese, Korean, Thai, Vietnamese, Lao, Ethiopian, and some Indian scripts. (Sorry, Mayan hieroglyphs are not supported.)
    * A large number of extensions which add other functionality. The GNU Emacs distribution includes many extensions; many others are available separately--even a web browser