Which web based (in browser) editor is best for "advanced users" ?

Question

Over the last couple of days I have been collecting a set of "new era" web editors, that is leaving out FCKeditor and tinyMCE, mainly because they try to make the web Word. So far this is what I got:

Text Oriented

http://markitup.jaysalvat.com/home/ (used by bitbucket)

http://github.com/derobins/wmd/tree (used by SO)

http://www.wymeditor.org/

http://code.google.com/p/jwysiwyg/

http://jhtmlarea.codeplex.com/

http://code.google.com/p/wmd/ (original)

from standard JS distros

http://developer.yahoo.com/yui/editor/

http://www.extjs.com/blog/2007/08/01/ext-v11-released/

http://www.dojotoolkit.org/book/dojo-book-0-9/part-2-dijit/advanced-editing-and-display/editor-rich-text

code oriented

http://codenode.org/

https://bespin.mozilla.com/

am I missing any? Also which one is best for which crowd?

My current conclusions are:

• markitup is the cleanest code hence best to extend, good for coders to use and advanced users.
• wmd (the modified version) is good if you don't need to hack on it see: http://blog.stackoverflow.com/2009/01/wmd-editor-reverse-engineered/
• wymeditor has potential to become a "for users" editor but it's growing too slowly.

Everything else is either trying to emulate Word, splits horrible markup or it's just a toy.

Answer 1

WYSISEX

What You See Is Semantically Edited XHTML ;)

Probably unknown to all (the author contacted me after I commented on a related bog post*) and in beta stage. I had a play with it recently and I really like it. The idea is to put content first.
http://devexed.com/wysisex/

* the related post (from 2007) has some editors not on your list, and also discusses how good they are: http://www.standards-schmandards.com/2007/wysiwyg-editor-test-2/