A Tiny MCE plugin which makes writing latex equation easy and WYSIWYG（what you see is what you get）. It converts latex code into image which shows real beautiful latex equations on your post.
It adds an “fx” botton on the wordpress TinyMCE editor, on clicks it the codecogs latex equation editor pops up, where you can edit latex, then click the copy button to copy the equation image back in TinyMCE textarea.
You can also use this editor to only input latex code and let plugins like quicklatex, mathjax or Latex for WordPess to convert it to equation image, you’d better change line 90 in editor_plugin.js 
tinyMCE.activeEditor.execCommand(‘mceInsertContent’, false, ”); 
to 
tinyMCE.activeEditor.execCommand(‘mceInsertContent’, false, ‘\[‘+latex+’\]’); 
inorder to only copy LaTex code to TinyMCE textarea when click the copy button.
I just followed the tutorial written by Greg Winiarski(http://ditio.net/2010/08/15/adding-custom-buttons-to-wordpress-tinymce/) and make codecogs Tiny MCE plugin(http://www.codecogs.com/latex/integration/tinymce/install.php) into a wordpress plugin. Thanks the great guys. If you can make the plugin better to use please tell me in http://www.verymath.com/2011/05/10/codecogs-latex-equation-editor/
<h3>Arbitrary section</h3>
You may provide arbitrary sections, in the same format as the ones above. This may be of use for extremely complicated 
plugins where more information needs to be conveyed that doesn’t fit into the categories of “description” or 
“installation.” Arbitrary sections will be shown below the built-in sections outlined above.
<h3>A brief Markdown Example</h3>
Ordered list:
<ol>
<li>Some feature</li>
<li>Another feature</li>
<li>Something else about the plugin</li>
</ol>
Unordered list:
<ul>
<li>something</li>
<li>something else</li>
<li>third thing</li>
</ul>
Here’s a link to <a href="https://wordpress.org/" title="Your favorite software" rel="ugc">WordPress</a> and one to <a href="http://daringfireball.net/projects/markdown/syntax" title="Markdown is what the parser uses to process much of the readme file" rel="nofollow ugc">Markdown’s Syntax Documentation</a>. 
Titles are optional, naturally.
Markdown uses email style notation for blockquotes and I’ve been told:
<blockquote>
Asterisks for emphasis. Double it up for strong.
</blockquote>
<pre><code><?php code(); // goes in backticks ?>
</code></pre>

Codecogs Latex Equation Editor

Adds codecogs WYSIWYG LaTex equation popup editor to wordrpess TinyMCE editor.

Automattic

Michael Adams (mdawaffe)

sidney

NOTE: For must users, we recommend using <a href="http://jetpack.me/" rel="nofollow ugc">Jetpack</a> and 
its <a href="http://jetpack.me/support/beautiful-math-with-latex/" rel="nofollow ugc">Beautiful Math feature</a>. 
WP LaTeX offers additional control since it allows you to host your own LaTeX 
image server.
Writing equations and formulae is a snap with LaTeX, but really hard on a website. 
No longer. This plugin combines the power of LaTeX and the simplicity of WordPress 
to give you the ultimate in math blogging platforms.
Wow that sounds nerdy.
<h3>Other Plugins</h3>
<a href="http://sixthform.info/steve/wordpress/index.php?p=13" rel="nofollow ugc">Steve Mayer’s LatexRender Plugin</a> 
is based on a <a href="http://www.mayer.dial.pipex.com/tex.htm" rel="nofollow ugc">LaTeX Rendering Class</a> originally 
written by Benjamin Zeiss. Its requirements are somewhat different and has a different 
installation procedure.
<a href="https://wordpress.org/plugins/mathjax-latex/" rel="ugc">MathJax-LaTeX</a>
<a href="https://wordpress.org/plugins/simple-mathjax/" rel="ugc">Simple Mathjax</a>

WP LaTeX

WP LaTeX creates PNG images from inline $\LaTeX$ code in your posts and comments.

Codecogs Latex Equation Editor vs WP LaTeX