Keisuke Nemoto

This plugin moving attachment file to other protected directory.
<pre><code>/wp-content/uploads/path/to/file -> `/wp-content/uploads/protect/path/to/file` </code></pre>
But, attachment file url is not changed. WordPress will return the attachment file content, check the access permission.

Invisible

blackc2004

New Features: 
* 1.5 – Allows all users who are logged in to see all Private posts 
* show_private_posts() is now a widget 
* Merged with Partial Private Post (See below)
This plugin is a full featured private post management interface. It allows you to manage all private post’s publishing status via the “Manage” admin menu. It also provides the function “show_private_posts()” which can be used on the main page to list recent private posts (This can be used as either a function call or a widget). It uses the option ‘posts_per_page’ to determine how many recent private posts to display.
<h3>Arbitrary section</h3>

PrivatePost

This plugin is a full featured private post management interface. It allows you to manage all private post's publishing status via the "Mana …

Invisible vs PrivatePost