Many people have contributed code included in the Free Software Foundation’s distribution of GNU Emacs. To show our appreciation for their public spirit, we list here in alphabetical order those who have written substantial portions. Others too numerous to mention have reported and fixed bugs, and added features to many parts of Emacs. We thank them for their generosity as well.
This list is intended to mention every contributor of a major package or
feature we currently distribute; if you know of someone we have omitted,
please make a bug report. More comprehensive information is
available in the
ChangeLog files, summarized in the file
etc/AUTHORS in the distribution.
double.el, for typing accented characters not normally available from the keyboard;
xt-mouse.el, which allows mouse commands through Xterm;
gnus-cus.el, which implements customization commands for Gnus;
gnus-cite.el, a citation-parsing facility for news articles;
gnus-score.el, scoring for Gnus;
cpp.el, which hides or highlights parts of C programs according to preprocessor conditionals; and the widget library files
widget.el. He also co-wrote
artist.el, a package for producing ASCII art with a mouse or with keyboard keys.
jka-cmpr-hook.el, providing automatic decompression and recompression for compressed files.
dbus.el, a package that implements the D-Bus message bus protocol;
zeroconf.el, a mode for browsing Avahi services;
secrets.el, an interface to keyring daemons for storing confidential data; and
filenotify.eland the associated low-level interface routines, for watching file status changes. He and Kai Großjohann wrote the Tramp package, which provides transparent remote file editing using ssh, ftp, and other network protocols. He and Daniel Pittman wrote
scroll-lock.el, a minor mode which keeps the point vertically fixed by scrolling the window when moving up and down in the buffer.
prolog.el, a mode for editing Prolog (and Mercury) code.
image-file.el, support code for visiting image files;
minibuf-eldef.el, a minor mode that hides the minibuffer default value when appropriate;
rfn-eshadow.el, shadowing of
mb-depth.el, display of minibuffer depth;
button.el, the library that implements clickable buttons;
face-remap.el, a package for changing the default face in individual buffers; and
macroexp.elfor macro-expansion. He also worked on an early version of the lexical binding code.
strokes.el, a mode for controlling Emacs by moving the mouse in particular patterns.
emacs-lock.el(based on the original version by Tom Wurgler), which makes it harder to exit with valuable buffers unsaved; and
frameset.el, for saving and restoring the frame/window setup. He also made many other contributions to other areas, including MS Windows support.
calculator.el, a desktop calculator for Emacs.
footnote.elwhich lets you include footnotes in email messages; and
earcon.el, which provide sound effects for Gnus. He also wrote
CREDITSin the ERC distribution).
todo-mode.el(based on the original version by Oliver Seidel), a package for maintaining
cal-html.el, which produces HTML calendars.
opascal.el, a mode for editing Object Pascal source code.
rst.el, a mode for editing reStructuredText documents.
tvi970.el, terminal support for the TeleVideo 970 terminals; and co-wrote
term.el, a terminal emulator in an Emacs buffer.
landmark.el, a neural-network robot that learns landmarks.
diff.el, a program to display
dirtrack.el, a library for tracking directory changes in shell buffers;
filecache.el, which records which directories your files are in;
locate.el, which interfaces to the
find-lisp.el, an Emacs Lisp emulation of the
net-utils.el; and the generic mode feature.
xml.el, an XML parser for Emacs; and
ada-prj.el, editing of Ada mode project files, as well as co-authoring
foldout.el, providing folding extensions to Emacs’s outline modes.
array.el, for editing arrays and other tabular data.
ogonek.el, a package for changing the encoding of Polish characters.
feedmail.el, a package for massaging outgoing mail messages and sending them through various popular mailers.
ewoc.el, an Emacs widget for manipulating object collections. Per Cederqvist, Inge Wallin, and Thomas Bellman wrote
avl-tree.el, for balanced binary trees.
advice.el, an overloading mechanism for Emacs Lisp functions; and
trace.el, a tracing facility for Emacs Lisp.
makeinfo.el, modes and utilities for working with Texinfo files; and
page-ext.el, commands for extended page handling. He also wrote the Emacs Lisp introduction. See Introduction to Programming in Emacs Lisp.
hangul.el, utilities for Korean Hanja.
tabulated-list.el, a generic major mode for lists of data; and improved support for themes and packages.
edt.el, an emulation of DEC’s EDT editor.
gamegrid.eland a couple of games that use it, Snake and Tetris.
spam-wash.el, to decode and clean email before it is analyzed for spam.
pdumper.cand elsewhere. He also implemented double-buffering for X-based GUI frames, and the original support for loading shared-object modules into Emacs.
json.el, a file for parsing and generating JSON files.
easy-mmode.el, a package for easy definition of major and minor modes.
disass.el, a disassembler for compiled Emacs Lisp code.
image-dired.el, a package for viewing image files as thumbnails.
notifications.el, and related packages for ERC and Gnus); and
color.el, a library for general color manipulation. He also made various contributions to Gnus.
htmlfontify.el, to convert a buffer or source tree to HTML.
delsel.el, a package to make newly-typed text replace the current selection.
tq.el, help functions for maintaining transaction queues between Emacs and its subprocesses.
pong.el, an implementation of the classical pong game.
mspools.el, which tells you which Procmail folders have mail waiting in them.
f90.el, a mode for Fortran 90 files.
nnmairix.el, an interface to the Mairix indexing tool.
simula.el, a mode for editing SIMULA 87 code.
reposition.el, a command for recentering a function’s source code and preceding comment on the screen.
cdl.el, functions for working with Common Data Language source code.
morse.el, which converts text to Morse code.
ldap.el, the LDAP client interface.
bookmark.el, which implements named placeholders;
mail-hist.el, a history mechanism for outgoing mail messages; and
saveplace.el, for preserving point’s location in files between editing sessions.
scroll-all.el, a mode for scrolling several buffers together.
rlogin.el, an interface to Rlogin,
type-break.el, which reminds you to take periodic breaks from typing, and
eldoc-mode, a mode to show the defined parameters or the doc string for the Lisp function near point.
hexl.el, a mode for editing binary files.
flow-ctrl.el, a package for coping with unsuppressible XON/XOFF flow control.
python.el, the major mode for the Python programming language used in Emacs 24.3 onwards.
w32-win.el, support functions for the MS-Windows window system.
wdired.el, a package for performing file operations by directly editing Dired buffers.
rot13.el, a command to display the plain-text form of a buffer encoded with the Caesar cipher;
vt100-led.el, a package for controlling the LEDs on VT100-compatible terminals; and much of the support for ISO-8859 European character sets (which includes
time-stamp.el, a package for maintaining last-change time stamps in files.
gnus-ml.el, a mailing list minor mode for Gnus.
Calc, an advanced calculator and mathematical tool, since maintained and developed by Jay Belanger;
complete.el, a partial completion mechanism; and
edmacro.el, a package for editing keyboard macros.
sregex.el, a facility for writing regexps using a Lisp-like syntax.
avoid.el, a package to keep the mouse cursor out of the way of the text cursor;
shadowfile.el, a package for keeping identical copies of files in more than one place;
format.el, a package for reading and writing files in various formats;
enriched.el, a package for saving text properties in files;
facemenu.el, a package for specifying faces; and
descr-text.el, describing text and character properties.
ffap.elwhich visits a file, taking the file name from the buffer.
dcl-mode.elfor editing DCL command files.
iso-cvt.el, a package to convert between the ISO 8859-1 character set and the notations for non-ASCII characters used by TeX and net tradition.
gnus-bookmark.el, bookmark support for Gnus; as well as helping to maintain Org mode (q.v.).
find-file.el, a package to visit files related to the currently visited file.
composite.el, which provides a minor mode that composes characters automatically when they are displayed;
isearch-x.el, a facility for searching non-ASCII text; and
ps-bdf.el, a BDF font support for printing non-ASCII text on a PostScript printer. Together with Naoto Takahashi, he wrote
quail.el, an input facility for typing non-ASCII text from an ASCII keyboard.
yenc.el, for decoding yenc encoded messages.
echistory.el, packages for browsing command history lists;
helper.el, which provide an alternative command loop and appropriate help facilities;
emacsbug.el, a package for reporting Emacs bugs;
picture.el, a mode for editing ASCII pictures; and
view.el, a package for perusing files and buffers without editing them.
mouse-drag.el, which provide alternative mouse-based editing and scrolling features.
utf7.el, support for mail-safe transformation format of Unicode.
intangibletext property, and rearranged the structure of the
Lisp_Objecttype to allow for more data bits.
hippie-exp.el, a versatile completion and expansion package.
html2text.el, a html to plain text converter.
browse-url.el, a package for invoking a WWW browser to display a URL.
dns.elfor Domain Name Service lookups;
format-spec.elfor formatting arbitrary format strings;
netrc.elfor parsing of
time-date.elfor general date and time handling. He also wrote
network-stream.el, for opening network processes;
url-queue.el, for controlling parallel downloads of URLs; and implemented libxml2 support. He also wrote
eww.el, an Emacs Lisp web browser; and implemented native zlib decompression. Components of Gnus have also been written by: Nagy Andras, David Blacka, Scott Byer, Ludovic Courtès, Julien Danjou, Kevin Greiner, Kai Großjohann, Joe Hildebrand, Paul Jarc, Simon Josefsson, Sascha Lüdecke, David Moore, Jim Radford, Benjamin Rutt, Raymond Scholz, Thomas Steffen, Reiner Steib, Jan Tatarik, Didier Verna, Ilja Weis, Katsumi Yamaoka, Teodor Zlatanov, and others (see Contributors in the Gnus Manual).
find-cmd.el, to build a
icalendar.el, a package for converting Emacs diary entries to and from the iCalendar format;
newsticker.el, an RSS and Atom based Newsticker; and
bubbles.el, a puzzle game.
life.el, a package to play Conway’s Game of Life.
shadow.el, a package for finding potential load-path problems when some Lisp file shadows another.
dns-mode.el, an editing mode for Domain Name System master files;
dig.el, a Domain Name System interface;
flow-fill.el, a package for interpreting RFC2646 formatted text in messages;
fringe.el, a package for customizing the fringe;
imap.el, an Emacs Lisp library for talking to IMAP servers;
password-cache.el, a password reader;
nnimap.el, the IMAP back-end for Gnus;
url-imap.elfor the URL library;
rfc2104.el, a hashed message authentication facility; the Gnus S/MIME and Sieve components; and
starttls.elfor the Transport Layer Security protocol.
latexenc.el, a package to automatically guess the correct coding system in LaTeX files.
vc-git.el, support for the Git version control system.
smtpmail.el, used for sending out mail with SMTP.
vc-hg.el, support for the Mercurial version control system.
bib-mode.el, a mode for maintaining bibliography databases compatible with
refbib.el, a package to convert those databases to the format used by the LaTeX text formatting package.
ucs-normalize.elfor Unicode normalization.
sasl-ntlm.elfor NT LanManager authentication support.
sort.el, commands to sort text in Emacs buffers.
ediff, an interactive interface to the
mergeprograms; and Viper, an emulator of the VI editor.
filelock.c, which provide simple support for multiple users editing the same file. He also wrote the initial version of
uniquify.el, a facility to make buffer names unique by adding parts of the file’s name to the buffer name.
ps-mode.el, a mode for editing PostScript files and running a PostScript interpreter interactively from within Emacs.
hex-util.el, for operating on hexadecimal strings; and support for HMAC (Keyed-Hashing for Message Authentication).
flymake.el, a minor mode for performing on-the-fly syntax checking.
hi-lock.el, a minor mode for interactive automatic highlighting of parts of the buffer text.
iimage.el, a minor mode for displaying inline images.
xmenu.c, part of Emacs’s pop-up menu support.
dired-mode, with contributions by Lawrence R. Dodd. He also wrote
ls-lisp.el, a Lisp emulation of the
lscommand for platforms that don’t have
lsas a standard program.
tempo.el, providing support for easy insertion of boilerplate text and other common constructions.
cconv.el, providing closure conversion for statically scoped Emacs lisp.
edebug.el, a source-level debugger for Emacs Lisp;
cl-specs.el, specifications to help
edebugdebug code written using David Gillespie’s Common Lisp support; and
isearch.el, Emacs’s incremental search minor mode. He also co-wrote
ps-print(with Jim Thompson, Jacques Duthen, and Kenichi Handa), a package for pretty-printing Emacs buffers to PostScript printers;
delim-col.el, a package to arrange text into columns;
ebnf2ps.el, a package that translates EBNF grammar to a syntactic chart that can be printed to a PostScript printer; and
whitespace.el, a package that detects and cleans up excess whitespace in a file (building on an earlier version by Rajesh Vaidheeswarran).
expand.el, which uses the abbrev mechanism for inserting programming constructs.
elint.el, a Lint-style code checker for Emacs Lisp programs.
msb.el, which provides more flexible menus for buffer selection; co-wrote
imenu.el(q.v.); and rewrote
dabbrev.el, originally written by Don Morrison.
autorevert.el, a package for automatically reverting files visited by Emacs that were changed on disk;
cwarn.el, a package to highlight suspicious C and C
follow.el, a minor mode to synchronize windows that show the same buffer.
filesets.el, a package for handling sets of files.
misearch.el, extending isearch to multi-buffer searches; the code in
files-x.elfor handling file- and directory-local variables; and the
info-finderfeature that creates a virtual Info manual of package keywords. He also implemented the Tab Bar and window tab-lines, and added numerous enhancements and improvements in I-search.
pcmpl-x.el, providing completion for miscellaneous external tools; and revamped support for Octave in Emacs 24.4.
vc-annotate.el, support for version control annotation.
autoarg-mode, a global minor mode whereby digit keys supply prefix arguments;
autoarg-kp-mode, which redefines the keypad numeric keys to digit arguments;
autoconf.el, a mode for editing Autoconf files;
cfengine.el, a mode for editing Cfengine files;
elide-head.el, a package for eliding boilerplate text from file headers;
hl-line.el, a minor mode for highlighting the line in the current window on which point is;
cap-words.el, a minor mode for motion in
latin1-disp.el, a package that lets you display ISO 8859 characters on Latin-1 terminals by setting up appropriate display tables; the version of
python.elused prior to Emacs 24.3;
smiley.el, a facility for displaying smiley faces;
sym-comp.el, a library for performing mode-dependent symbol completion;
benchmark.elfor timing code execution; and
tool-bar.el, a mode to control the display of the Emacs tool bar. With Riccardo Murri he wrote
vc-bzr.el, support for the Bazaar version control system.
checkdoc.el, for checking doc strings in Emacs Lisp programs;
dframe.el, providing dedicated frame support modes;
ezimage.el, a generalized way to place images over text;
chart.elfor drawing bar charts etc.; and the EIEIO (Enhanced Implementation of Emacs Interpreted Objects) package. He was also the main author of the CEDET (Collection of Emacs Development Environment Tools) package. Portions were also written by Jan Moringen, David Ponce, and Joakim Verona.
compile.el(since updated by Daniel Pfeiffer), a package for running compilations in a buffer, and then visiting the locations reported in error messages;
etags.el, a package for jumping to function definitions and searching or replacing in all the files mentioned in a
TAGSfile; with Sebastian Kremer
find-dired.el, for using
diredcommands on output from the
grep.elfor running the
map-ynp.el, a general purpose boolean question-asker;
autoload.el, providing semi-automatic maintenance of autoload files.
decipher.el, a package for cracking simple substitution ciphers.
appt.el, functions to notify users of their appointments. It finds appointments recorded in the diary files used by the
allout.el, a mode for manipulating and formatting outlines, and
icomplete.el, which provides incremental completion feedback in the minibuffer.
perl-mode.el, a mode for editing Perl code.
hideif.el, support for hiding selected code within C
regexp-opt.el, which generates a regular expression from a list of strings; and the fast-lock and lazy-lock font-lock support modes. He also extended
shell.el, originally written by Olin Shivers.
bibtex.el, a mode for editing BibTeX bibliography files.
autoinsert.el, which provides automatic mode-sensitive insertion of text into new files.
blackbox.el, a version of the traditional blackbox game.
derived.el, which allows one to define new major modes by inheriting key bindings and commands from existing major modes.
:extendface attribute, and also implemented the optional
repeat.el, a command to repeat the preceding command with its arguments.
cl-indent.el, a package for indenting Common Lisp code;
ebuff-menu.el, an electric browser for buffer listings;
ehelp.el, bindings for browsing help screens; and
rfc822.el, a parser for E-mail addresses in the format used in mail messages and news articles (Internet RFC 822 and its successors).
ebrowse, the C
jit-lock.el, the Just-In-Time font-lock support mode;
tooltip.el, a package for displaying tooltips;
authors.el, a package for maintaining the
rx.el, a regular expression constructor.
PCL-CVS, a directory-level front end to the CVS version control system;
reveal.el, a minor mode for automatically revealing invisible text;
smerge-mode.el, a minor mode for resolving
diff-mode.el, a mode for viewing and editing context diffs;
css-mode.elfor Cascading Style Sheets;
bibtex-style.elfor BibTeX Style files;
mpc.el, a client for the Music Player Daemon (MPD);
smie.el, a generic indentation engine; and
pcase.el, implementing ML-style pattern matching. In Emacs 24, he integrated the lexical binding code, cleaned up the CL namespace (making it acceptable to use CL functions at runtime), added generalized variables to core Emacs Lisp, and implemented a new lightweight advice mechanism.
crm.el, a package for reading multiple strings with completion, and
rfc2368.el, support for
disp-table.el, for dealing with display tables;
mailheader.el, for parsing email headers; and
parse-time.el, for parsing time strings.
quail.el(q.v.), and wrote
robin.el, another input method.
make-mode.el, a mode for editing makefiles.
hideshow.el, a minor mode for selectively displaying blocks of text.
romanian.el, support for editing Romanian text;
iris-ansi.el, support for running Emacs on SGI’s
wintermterminal emulators; and
vc-dir.el, displaying the status of version-controlled directories.
savehist.el, for saving the minibuffer history between Emacs sessions.
kermit.el, a package to help the Kermit dialup communications program run comfortably in an Emacs shell buffer.
ange-ftp.el, providing transparent FTP support.
ert.el, a library for automated regression testing.
gnus-mlspl.el, a group params-based mail splitting mechanism.
table.el, a package for creating and editing embedded text-based tables.
mixal-mode.el, an editing mode for the MIX assembly language.
quickurl.el, a simple method of inserting a URL into the current buffer based on text at point;
5x5.el, a game to fill all squares on the field.
sun.el, key bindings for sunterm keys.
hanoi.el, an animated demonstration of the Towers of Hanoi puzzle.
mailcap.el(with Lars Magne Ingebrigtsen), a MIME media types configuration facility;
mwheel.el, a package for supporting mouse wheels; co-wrote (with Dave Love)
socks.el, a Socks v5 client; and developed the URL package.
gnus-vm.el, the VM interface for Gnus.
find-func.el, which makes it easy to find the source code for an Emacs Lisp function or variable.
map.el, a library providing map-manipulation functions that work on alists, hash-table and arrays;
seq.el, a library providing advanced sequence manipulation functions and macros; and
thunk.el, a library providing functions and macros to delay the evaluation of forms. He also created the new icon in Emacs 25.
Daniel Pfeiffer wrote
conf-mode.el, a mode for editing
copyright.el, a package for updating
copyright notices in files;
executable.el, a package for
executing interpreter scripts;
sh-script.el, a mode for editing
skeleton.el, implementing a concise language for
writing statement skeletons; and
two-column.el, a minor mode
for simultaneous two-column editing.
Daniel also rewrote
apropos.el (originally written by Joe Wells),
for finding commands, functions, and variables matching a regular
expression; and, together with Jim Blandy, co-authored
support for Wyse 50 terminals. He also co-wrote
pop3.el, a Post Office Protocol (RFC 1460) interface for Emacs.
po.el, support for PO translation files.
soundex.el, an implementation of the Soundex algorithm for comparing English words by their pronunciation.
recentf.el, a package that puts a menu of recently visited files in the Emacs menu bar;
ruler-mode.el, a minor mode for displaying a ruler in the header line; and
tree-widget.el, a package to display hierarchical data structures.
cmacexp.el, providing a command which runs the C preprocessor on a region of a file and displays the results. He also expanded and redesigned the
fortran.el, a mode for editing Fortran code.
refer.el, commands to look up references in bibliography files by keyword.
vc.el, an interface to the RCS and SCCS source code version control systems, with Paul Eggert;
gud.el, a package for running source-level debuggers like GDB and SDB in Emacs;
asm-mode.el, a mode for editing assembly language code;
AT386.el, terminal support package for IBM’s AT keyboards;
cookie1.el, support for fortune-cookie programs like
finder.el, a package for finding Emacs Lisp packages by keyword and topic;
keyswap.el, code to swap the
loadhist.el, functions for loading and unloading Emacs features;
lisp-mnt.el, functions for working with the special headers used in Emacs Lisp library files; and code to set and make use of the
load-historylisp variable, which records the source file from which each lisp function loaded into Emacs came.
cal-mayan.el), Nachum Dershowitz (
cal-hebrew.el), Paul Eggert (
cal-dst.el), Steve Fisk (
cal-tex.el), Michael Kifer (
cal-x.el), Lara Rios (
cal-menu.el), and Denis B. Roegel (
solar.el). Andy Oram contributed to its documentation. Reingold also contributed to
tex-mode.el, a mode for editing TeX files, as did William F. Schelter, Dick King, Stephen Gildea, Michael Prange, and Jacob Gore.
mailclient.elwhich can send mail via the system’s designated mail client.
which-func.el, a mode that shows the name of the current function in the mode line.
vt-control.el, providing some control functions for the DEC VT line of terminals.
t-mouse.el, for mouse support in text terminals; and
gdb-ui.el, a graphical user interface to GDB. Together with Dmitry Dzhus, he wrote
gdb-mi.el, the successor to
handwrite.el, which converts text into “handwriting”.
cus-test.el, a testing framework for customize.
scheme.el, a mode for editing Scheme and DSSSL code.
winner.el, which records recent window configurations so you can move back to them.
info-xref.el, a library for checking references in Info files.
so-long.el, a set of features for easier editing of files with very long lines.
completion.el, providing dynamic word completion.
fortune.el, a package for using fortune in message signatures.
telnet.el, support for
telnetsessions within Emacs.
battery.el, a package for displaying laptop computer battery status, and
info-look.el, a package for looking up Info documentation for symbols in the buffer.
modula2.el, a mode for editing Modula-2 code, based on work by Mick Jordan and Peter Robinson.
dunnet.el, a text adventure game.
gomoku.el, a Go Moku game played against Emacs; and
mpuz.el, a multiplication puzzle.
solitaire.el, an implementation of the Solitaire game.
ansi-color.el, a package for translating ANSI color escape sequences to Emacs faces;
sql.el, a package for interactively running an SQL interpreter in an Emacs buffer;
cus-theme.el, an interface for custom themes;
master.el, a package for making a buffer ‘
master’ over another; and
spam-stat.el, for statistical detection of junk email. He also wrote parts of the IRC client ERC (q.v.).
pp.el, a pretty-printer for lisp objects.
windmove.el, a set of commands for selecting windows based on their geometrical position on the frame.
uce.el, for responding to unsolicited commercial email.
hilit-chg.el, which uses colors to show recent editing changes.
comint.el, a library for modes running interactive command-line-oriented subprocesses, and
shell.el, for running inferior shells (both since extended by Simon Marshall);
cmuscheme.el, for running inferior Scheme processes;
inf-lisp.el, for running inferior Lisp process.
pascal.el, a mode for editing Pascal code.
backquote.el, a lisp macro for creating mostly-constant data.
help-macro.el, a macro for writing interactive help for key bindings.
icon.el, a mode for editing Icon code.
ielm.el, a mode for interacting with the Emacs Lisp interpreter as a subprocess.
scribe.el, a mode for editing Scribe files, and
server.el, a package allowing programs to send files to an extant Emacs job to be edited.
pc-select.el, which rebinds keys for selecting regions to follow many other systems.
easymenu.el, a facility for defining Emacs menus;
image-mode.el, support for visiting image files;
menu-bar.el, the Emacs menu bar support code;
paren.el, a package to make matching parentheses stand out in color; and also co-authored portions of CC mode.
midnight.el, a package for running a command every midnight.
imenu.el, a framework for browsing indices made from buffer contents.
vcursor.el, which implements a virtual cursor that you can move with the keyboard and use for copying text.
ispell.el, a spell-checker interface.
bindat.el, a package for encoding and decoding binary data; CUA mode, which allows Emacs to emulate the standard CUA key bindings;
ido.el, a package for selecting buffers and files quickly;
keypad.elfor simplified keypad bindings; and
kmacro.el, the keyboard macro facility.
++, Objective-C, Java, Pike, CORBA IDL, and AWK code.
spook.el, and even if he did, he really didn’t mean for you to use it in an anarchistic way.
bs.el, a package for manipulating Emacs buffers.
slovak.el, support for editing text in Slovak language.
flymake.el, an on-the-fly syntax-checking package.
help-at-pt.el, providing local help through the keyboard.
thumbs.el, a package for viewing image files as thumbnails.
dabbrev.el, providing a command which completes the partial word before point, based on other nearby words for which it is a prefix. He also wrote the original dumping support.
linum.el, a minor mode that displays line numbers in the left margin.
tcl.el, a mode for editing Tcl/Tk source files and running a Tcl interpreter as an Emacs subprocess. Tom Tromey also wrote
bug-reference.el, providing clickable links to bug reports; and the first version of the Emacs package system.
rmail-spam-filter.el, a spam filter for RMAIL.
starttls.el, support for Transport Layer Security protocol;
sasl-digest.el(with Kenichi Okada), and
sasl.el, support for Simple Authentication and Security Layer (SASL);
plstore.elfor secure storage of property lists; and the EasyPG (and its predecessor PGG) package, for GnuPG and PGP support.
rmailsort.el, a package for sorting messages in RMAIL folders;
metamail.el, an interface to the Metamail program;
gnus-kill.el, the Kill File mode for Gnus;
gnus-mh.el, an mh-e interface for Gnus;
gnus-msg.el, a mail and post interface for Gnus; and
timezone.el, providing functions for dealing with time zones.
webjump.el, a Web hotlist package.
rect.el, a package of functions for operations on rectangle regions of text. He also contributed to Gnus (q.v.).
meta-mode.el, for editing MetaFont code.
dos-w32.el, functions shared by the MS-DOS and MS-Windows ports of Emacs, and
w32-fns.el, MS-Windows specific support functions.
forms.eland its associated files, a mode for filling in forms. He also wrote
iso-acc.el, a minor mode providing electric accent keys.
cc-mode.el, a mode for editing C, C
++, and Java code, based on earlier work by Dave Detlefs, Stewart Clamen, and Richard Stallman;
elp.el, a profiler for Emacs Lisp programs;
man.el, a mode for reading Unix manual pages;
regi.el, providing an AWK-like functionality for use in lisp programs;
reporter.el, providing customizable bug reporting for lisp packages; and
supercite.el, a minor mode for quoting sections of mail messages and news articles.
antlr-mode.el, a major mode for ANTLR grammar files.
desktop.el, facilities for saving some of Emacs’s state between sessions;
timer.el, the Emacs facility to run commands at a given time or frequency, or when Emacs is idle, and its C-level support code;
pc-win.el, the MS-DOS “window-system” support;
internal.el, an “internal terminal” emulator for the MS-DOS port of Emacs;
arc-mode.el, the mode for editing compressed archives;
s-region.el, commands for setting the region using the shift key and motion commands; and
dos-fns.el, functions for use under MS-DOS.
resume.el, support for processing command-line arguments after resuming a suspended Emacs job; and
mail-extr.el, a package for extracting names and addresses from mail headers, with contributions from Jamie Zawinski.
vhdl-mode.el, a major mode for editing VHDL source code.
align.el, a set of commands for aligning text according to regular-expression based rules;
isearchb.elfor fast buffer switching;
timeclock.el, a package for keeping track of time spent on projects; the Bahá’í calendar support;
pcomplete.el, a programmable completion facility;
remember.el, a mode for jotting down things to remember;
eudcb-mab.el, an address book backend for the Emacs Unified Directory Client; and
eshell, a command shell implemented entirely in Emacs Lisp. He also contributed to Org mode (q.v.).
thingatpt.el, a library of functions for finding the “thing” (word, line, s-expression) at point.
proced.el, a system process editor.
emerge.el, a package for interactively merging two versions of a file.
woman.el, a package for browsing manual pages without the
ld-script.el, an editing mode for GNU linker scripts, and contributed subword handling and style guessing in CC mode.
testcover.el, a package for keeping track of the testing status of Emacs Lisp code;
unsafep.elto determine if a Lisp form is safe; and the SES spreadsheet package.
rcirc.ela simple Internet Relay Chat client.
cperl-mode.el, a major mode for editing Perl code. Ilya Zakharevich also wrote
tmm.el, a mode for accessing the Emacs menu bar on a text-mode terminal.
czech.el, support for editing Czech text;
glasses.el, a package for easier reading of source code that uses illegible identifier names; and
tildify.el, commands for adding hard spaces to text, TeX, and SGML/HTML files.
zone.el, a package for people who like to zone out in front of Emacs.
tty-colors.el, which implements transparent mapping of X colors to tty colors; and
rxvt.el. He implemented support for bidirectional text, menus on text-mode terminals, and built-in display of line numbers.
mailabbrev.el, a package that provides automatic expansion of mail aliases, and
tar-mode.el, which provides simple viewing and editing commands for tar files.
binhex.el, a package for reading and writing binhex files;
mm-partial.el, message/partial support for MIME messages;
rfc1843.el, an HZ decoding package;
uudecode.el, an Emacs Lisp decoder for uuencoded data; and
webmail.el, an interface to Web mail. He also wrote several other Gnus components.
vi.el, an emulation of the VI text editor.
re-builder.el, a package for building regexps with visual feedback.