AUCTeX is an extensible package that supports writing and formatting
TeX files for most variants of Emacs.
AUCTeX supports many different TeX macro packages, including AMS-TeX,
LaTeX, Texinfo and basic support for ConTeXt. Documentation can be
found under /usr/share/doc, e.g. the reference card (tex-ref.pdf) and
the FAQ. The AUCTeX manual is available in Emacs info (C-h i d m
AUCTeX RET). On the AUCTeX home page, we provide manuals in various
formats.
AUCTeX includes preview-latex support which makes LaTeX a tightly
integrated component of your editing workflow by visualizing selected
source chunks (such as single formulas or graphics) directly as images
in the source buffer.
This package is for GNU Emacs.