Html-Helper-Mode - http://www.santafe.edu/~nelson/tools/ The original HTML mode by Nelson Minar.
Sxml-Mode - http://koala.ilog.fr/plh/sxml.html A mode for XML in (X)Emacs using the Simple API for XML (SAX).
XSLT-Process - http://xslt-process.sourceforge.net/ A mode which allows running an XSLT processor on a buffer.
BHL mode for Emacs - http://www.nongnu.org/bhl/ Convert plain text into HTML, LaTeX and SGML.
HTML Helper Mode - http://www.nongnu.org/baol-hth/ Major mode for editing HTML files. The current address of the mode originally written by Nelson Minar and now maintained by Gian Uberto Lauri.
PSGML Mode - http://www.lysator.liu.se/projects/about_psgml.html Major mode for editing SGML and XML documents.
Emacs HTML 3.2 Mode - http://fsinfo.noone.org/~abe/htmlmode/ An Emacs major mode for editing HTML files by Axel Beckert.
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