Edward

Enables the display of custom-field variables in the WordPress post editor via a TinyMCE button. Works well with custom post types as well as default post types.
Use the TinyMCE button to choose from a list of custom fields attached to the post to insert, or manually specify a custom field to display using the following syntax:
<pre><code>{%custom_field_name%}
</code></pre>

Custom Field Variables

Enables the display of custom-field variables in the WordPress post editor via a TinyMCE button. Works well with custom post types as well as default  …

Fahad Alduraibi

Do you write posts in different languages that have different directions? 
This plugin enables a feature in the post editor which allow writing texts in Left-to-Right and Right-to-Left directions in the same post (or page) so you can write in English (and any other LTR language) and also RTL languages like Arabic, Persian and Hebrew.
Simply look for the new buttons added to the post editor after installing the plugin. (See the screenshots for better understanding)
اضافة زرارين لشريط التحرير لتمكين تحويل النص للقراءة من اليمين لليسار مثل اللغة العربية والفارسية والعبرية
<a href="http://www.fadvisor.net/blog/2008/10/wp-rtl/" rel="nofollow ugc">More details</a>
<ul>
<li>Note: This plugin will not change the direction of the post title, since that is controlled by the theme.</li>
</ul>

WP-RTL

Adds two buttons to the TinyMCE editor to enable writing text in Left to Right (LTR) and Right to Left (RTL) directions.

Custom Field Variables vs WP-RTL