AUCTeX: Preview-Latex
- An attempt to embed LaTeX environments such as display math or figures into the source buffers. Provides the manual, mailing list, screenshots and download.
- http://www.gnu.org/software/auctex/preview-latex.html

WhizzyTeX
- Emacs minor mode and a shell-script deamon for incrementally previewing TeX files using either ghostscript-based or dvi-based previewers. Download and documentation.
- http://cristal.inria.fr/whizzytex/

ITe
- Authoring tool for LaTeX and TeX documents written in Elisp with a gallery of examples and an online manual.
- http://www.ctan.org/tex-archive/support/ite/

XEmacs: Lisp Code - TeX Letter
- Simple LaTeX templates for letters.
- http://www.skamphausen.de/cgi-bin/ska/tex-letter

YaTeX - Yet Another TeX mode for Emacs
- A package that supports composing LaTeX source on Emacs/Mule/XEmacs. An HTML editing mode is also included.
- http://www.yatex.org/

Nevin Kapur: Hacks
- A collection of Emacs packages that include bibfind.el and msn.el for searching the Mathematics ArXive and MathSciNet, and prosper.el for Prosper support in AUCTeX.
- http://www.cs.caltech.edu/~nkapur/hacks.html

RefTeX
- A package that provides distinct support for doing labels, references and citations in LaTeX for both Emacs and XEmacs. It runs as a minor mode with any LaTeX major mode, most notably AUCTeX. Bundled and preinstalled with Emacs since version 20.2, or do
- http://remote.science.uva.nl/~dominik/Tools/reftex/

CDLaTeX
- A package giving more LaTeX functionality for Emacs and XEmacs. It re-implements many features also found in AUCTeX.
- http://remote.science.uva.nl/~dominik/Tools/cdlatex/

The Hyperlatex package
- Makes it possible to write a document both for printout and web viewing. Documentation, FAQ and download. Program is written in GNU Emacs Lisp.
- http://hyperlatex.sourceforge.net/

AUC TeX
- A package that supports writing and formatting TeX files. Many different macro packages are supported, including AMS TeX, LaTeX, and TeXinfo.
- http://www.gnu.org/software/auctex/

P.S. Galbraith: Emacs packages
- font-latex, bib-cite, hilit-LaTeX, latex-units and other non TeX-related packages.
- http://people.debian.org/~psg/elisp/

Emacs ConTeXt mode
- Expands tex-mode with ConTeXt awareness. Created by Berend de Boer.
- http://www.berenddeboer.net/emacs/context.el

Triet Hoai Lai: Emacs
- latex-doc, latex-toolbar, ltxsymb and pifont for Pifont support in AucTeX.
- http://ee.usyd.edu.au/~thlai/emacs/

X-Symbol
- Overview of a package providing some semi-WYSIWYG in LaTeX or HTML source. Beyond that there are a description of the details, a manual and links to the project pages on sourceforge.
- http://x-symbol.sourceforge.net/