Emacs Beginner's HowTo
Provides a brief tutorial regarding Emacs. Also includes application to all flavors of Unix and even Emacs running on Microsoft Windows.
Emacs Keybinding Guide
Shows an explanation on how to deal with Emacs key bindings. With details on the various binding methods.
The Remembrance Agent
An Emacs plug-in that watches over your shoulder and suggests information relevant to what you're reading or writing.
A highly customizable open source text editor and application development system.