Emacs/W3 is a full-featured web browser, written entirely in Emacs-Lisp, that supports all the bells and whistles you will find in use on the web today, including frames, tables, stylesheets, and much more. Emacs/W3 runs on most major operating systems, including almost any flavor of Unix, Windows NT/95, AmigaDOS, OS/2, and VMS and is another reason to never leave Emacs.
Java Development Environment for Emacs (JDEE) is an Emacs-based integrated development environment (IDE) for developing Java applications and applets. Features include multiple code browsers, a JPDA-based debugger, method and field completion, template-based and procedure-based code generation, Java source code interpreter, context-sensitive help, and more.
Elvis is a clone of vi/ex, the standard UNIX editor. Elvis supports nearly all of the vi/ex commands, in both visual mode and ex mode. Elvis adds support for multiple files, multiple windows, a variety of display modes including "hex" and "html", on-line help, WYSIWYG printing, and other miscellaneous extensions.
Elfvector is a package for generating and using a transfer vector for subroutine linkage between an ELF executable and an ELF shared library under Linux on x86, in order to save space and application startup time. At runtime, only the name of the vector is looked up dynamically, no matter how many symbols are used from the vector. Elfvector also includes vectool for managing groups of shared libraries at fixed addresses.