W3 (written by William Perry in Emacs Lisp) is an extensible, advanced World Wide Web browser that runs as part of GNU Emacs. It has the ability to understand many protocols, including HTML, Telnet, WAIS, SMTP, gopher, ftp, et al. w3 is available via anonymous FTP from ftp://ftp.xemacs.org/pub/xemacs/emacs-w3/.