Noders like their text editing.
Philosophy: editor, My Text Editor, A word processor is not a text editor, line-at-a-time editor, Editing text on UNIX, Please use plain text, ASCII art
Emacs: escape meta alt control shift, XEmacs, the key commands all emacs users should know, The E2 Emacs Reference Guide, An introduction to EMACS, Making Emacs look pretty, Emacs Lisp/elisp, Lisp Interaction Mode, term-nasty.el
Hot Emacs Tips! C-x, M-x, hippie-expand, Using source control inside Emacs, an Emacs lisp example, useful emacs lisp functions, Emacs Code to Nodify The Tech's Shakespeare Texts, How to save outgoing mail with Emacs, HTML unlinker for Emacs, How to save a fontified buffer as HTML in Emacs, Using Emacs as a programmer's calculator, M-x % (which should be M-%, of course)
Silly Emacs features: Loading the ELIZA engine built into emacs, M-x doctor, M-x psychoanalyze-pinhead, M-x dissociated-press ate my homework, M-x dunnet, M-x tetris, M-x spook
vi: Learning the vi Editor, vi keys, :wq, :wq!, how to exit vi, vi macro, nvi (vi clone), ex (vi ancestor)
vim: cheat codes for vim, gvim (vim gets a GUI)
Holy Wars: emacs vi disjunction, Vi vs Emacs, The Church of Emacs, Have you let Emacs into your heart?, M-x praise-be-unto-emacs, M-x praise-be-unto-xemacs
ed: Ed is the Standard Editor
pico: pico -w
Notepad: Windows Notepad, Visual Notepad, How to add a notepad entry to the file right click menu, This Site Created With Notepad
Windows editors: EditPlus, Programmer's File Editor, editpad, TextPad, ultraedit, Notepad+, metapad, NoteTab, metapad (thanks MALTP)
Others: ex (for Unix), NEdit (for Motif), Scintilla (for GTK+) BBEdit (Mac), Hydra (OS X collaborative editor), Joe/Joe's Own Editor (*nix), Jed (multiplatform), EDLIN/EDIT (DOS), TECO (it's old)
You can go to http://directory.google.com/Top/Computers/Software/Editors/ for even more.
Please /msg anything I've missed.