ToddGee.commie

While doing a search for the AC site, I found the following javascript wysiwyg editors:

YUI
Review
Couldn't find a demo. Seems to have detractors (see review comments). Doesn't seem to play with the IMCE file uploader (whatever that is).

FCKeditor
(drupal) home page
Demo
Seems the nicest.  This is the one I've ended up installing on most of my sites.

TinyMCE
Demo (of full editor)

WYMeditor
Demo menu
basic demo
Somewhat unimpressive.

Whizzywig
home page
demo
Wow

Htmlarea
demo

This blog post showed a couple others too