bmsterling

This plugin adds more buttons to the non-visual editor view for creating/editing posts/pages
Currently adds: 
* h1 
* h2 
* h3 
* h4 
* h5 
* q 
* cite 
* sub 
* sup 
* dl 
* dt 
* dd
<h3>Credits</h3>
Copyright 2012 Benjamin Sterling (benjamin.sterling@kenzomedia.com)
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License, version 2, as 
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Quicktag Extender

This plugin adds more buttons to the non-visual editor view for creating/editing posts/pages

darrinb

Easily include raw markup languages (HTML, CSS, PHP, etc.) in comments using custom quicktags. No need to encode, the filter does it for you. Creates convenient “encode” buttons for comment authors in the HTML editor.
Also adds basic quicktag buttons on the comment forms, using the Quicktag API built into WordPress (as of 3.3).

Quicktag Extender vs WP Comment Encode