گناهکار

this plugin adds post custom fields in rss feed like this:
<pre><code><item>
...
<customfields>
<key1>value1</key1>
<key2>value2</key2>
...
</customfields>
...
</item>
</code></pre>

Custom fields in RSS

This plugin adds post custom fields in rss feed.

This plugin offers a simple interface to edit or delete any Custom Field names/keys you may have created in the post/page editor.
Deleting a Custom Field also deletes the associated content, so use with caution!
This is not meant to be a powerful plugin in the vein of <a href="http://www.advancedcustomfields.com/" rel="nofollow ugc">Advanced Custom Fields</a>.
Only users with role Editor and above have access to this plugin.

Edit Custom Fields

A simple interface to edit or delete Custom Fields.

Custom fields in RSS vs Edit Custom Fields