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.
Tongue in cheek paper regarding The Church of Emacs and the fate of non-believers.
A highly customizable open source text editor and application development system.