ANTLR Mode
Major mode that provides various features for editing ANTLR grammar files.
url: www.fmi.uni-passau.de/~wedler/antlr-mode/index.htm...
Bf.el
A BrainFuck interpreter written in Emacs-Lisp. To demonstrate that the implementation is really working, a weird test-case is included: An interpreter written in BrainFuck compiled to Emacs-Lisp executing BrainFuck code.
url: www.emacswiki.org/elisp/bf.el
CC Mode
The development homepage of the Mode for editing C/C++ and other languages with similar syntax.
url: cc-mode.sourceforge.net/
David Ponce's Emacs Page
Additions to JDE.
url: perso.wanadoo.fr/david.ponce/
ECB
A source code browser for Emacs. It is a global minor-mode which displays a couple of windows that can be used to browse directories, files and methods. It supports method parsing for Java, C, C++, Elisp. [Open source, GPL]
url: ecb.sourceforge.net/
Emacs Development Environment Tools
CEDET is a collection of tools written with the end goal of creating an advanced development environment for Emacs users.
url: cedet.sourceforge.net/
Emacs Major Modes and Packages
Bison and Flex mode can be found there.
url: www.eecs.tulane.edu/www/Beuscher/emacs/elisp.html
Emacs Rexx Mode
The current version of the Rexx mode for Emacs with complete font-locking and a Rexx-debug minor mode.
url: www.sve.man.ac.uk/General/Staff/perrin/rexx.html
Haskell Mode for Emacs
An Emacs mode currently supporting font locking, declaration scanning, documentation, indentation, hugs interaction.
url: www.haskell.org/haskell-mode/
Hugs mode for Emacs
Provides fontification and cooperation with Hugs -- by Chris Van Humbeeck.
url: www.haskell.org/libraries/hugs-mode.el
Ilisp
Integration of various Lisp implementations (mostly Common Lisp systems and various Scheme dialects) within Emacs.
url: sourceforge.net/projects/ilisp
Inform Mode
A major mode to edit programs written in the Inform programming language. Supports the usual program mode functions: automatic indentation, moving over expressions, comment and string filling, font locking, tags-file support, starting compiles and parsing errors.
url: www.rupert-lane.org/inform-mode/
PCL-CVS
Emacs interface to CVS, the open source Concurrent Versions System.
url: www.cvshome.org/dev/addonpclcvs.html
Phillip Lord's Emacs Packages
Mostly additional packages for JDE.
url: www.russet.org.uk/emacs.html
PHP Mode
Sourceforge project page of a major mode for editing PHP source.
url: sourceforge.net/projects/php-mode/
Python Mode
Python support for Emacs and XEmacs.
url: www.python.org/emacs/python-mode/
SQL mode
Development page for SQL mode and companion files.
url: www.geocities.com/kensanata/emacs-sql.html