xemacs

Steve Yegge writes about how XEmacs is dead.

I concur, I used XEmacs for a long time. I started on Emacs, but switched to XEmacs mainly because it supported multi-tty sessions and Emacs didn't. Now, Emacs 23 is supporting multi-tty, and I'm back to Emacs. I liked XEmacs a lot, it had some really sweet things, but it's great being back with Emacs.

knuth

Don Knuth uses Emacs when writing The Art of Computer Programming. Sweet.

bibtex and emacs

GNU Octave - a high-level language, primarily intended for numerical computations. Very much like MATLAB, but GPLed.
GNU Octave at Wikipedia
Octave Wiki
Octave FAQ

The Octave FAQ had a neat BibTeX reference:

 @BOOK{eaton:2002,
       author =     "John W. Eaton",
       title =      "GNU Octave Manual",
       publisher =  "Network Theory Limited",
       year =       "2002",
       isbn =       "0-9541617-2-6"
     }

Which got me thinking about how I'm going to deal with references in my M.Sc. and beyond. I'm thinking about BibTeX:

BibTeX basics
BibTeX.org
BibTeX at Wikipedia

Which then led me to think of how I would do this in Emacs and texinfo.

BibTeX at emacswiki

Ebib is a program for managing BibTeX databases.
BibTeX and Emacs at lyx wiki.
BibTeX - emacs mode
bibtex-utils.el
Planner mode from a bibtex buffer (I use Planner Mode in Emacs constantly)
bst-mode.el
RefTeX - provides distinct support for doing labels, references and citations in LaTeX.