gnu-emacs@gentoo.org
Gentoo GNU Emacs project
tex
AUCTeX is an extensible package for writing and formatting TeX files
in GNU Emacs and XEmacs. It supports many different TeX macro packages,
including AMS-TeX, LaTeX, Texinfo, ConTeXt, and docTeX (dtx files).
AUCTeX includes preview-latex 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.