Rudel is a collaborative editing environment for GNU Emacs. It supports multiple backends to enable communication with other collaborative editors using different protocols (most notably Gobby).
This emacs tutorial is designed for programers and scientists who wish to learn emacs to get things done quickly, without spending a lot time on learning Emacs's special terminologies and methods.
The OO-Browser is an advanced object-oriented class browser with support for browsing C, C++, Common Lisp and its Object System (CLOS), Eiffel, Java, Objective-C, Python and Smalltalk. It runs atop Emacs/XEmacs on Linux, UNIX and Windows.
EasyPG is an all-in-one GnuPG interface for Emacs. It consists of two parts: EasyPG Assistant and EasyPG Library. EasyPG Assistant is a set of convenient tools to use GnuPG from Emacs. EasyPG Library is a sort of an elisp port of GPGME, a wrapper library which provides API to access some of the GnuPG functions.