NateJacobs

<p>Expires a user’s access to a site after a specified number of days. It uses the user registered date/time and an admin configured number of days to determine when to expire the users access. The administrator can restore a user’s access from the user’s profile page.</p>
<p>There is a filter available for developers to hook into and alter the expiration date of a specific user on the fly during authentication. The filter uae_expiration_date passes the current expiration date and the WP_User object.</p>


User Access Expiration

A user's access to a site is disabled after a specified number of days. The admin can set the number of days since registration to deny access.

X-NicON

<p>A simple plugin that allows to set the date for the posts, after which will be performed one of 3 actions: “Add prefix to title”, “Move to drafts”, “Move to trash”.</p>
<h4>Features:</h4>
<ul>
<li>Set post expire date and time</li>
<li>Support custom post type (post and pages by default)</li>
<li>Action for expired posts: move to drafts, move to trash or add custom prefix for title</li>
<li>Adds class “post-expired” to post that expired on the site and in admin interface (for custom styles in theme)</li>
</ul>
<h4>Use in theme:</h4>
<pre><code>XNPostExpires::isExpired($post_id)

XNPostExpires::dateExpiration($post_id, $date_format)
</code></pre>


WP Post Expires

I haven't tried to debug what's wrong, but as soon as I installed the plugin I was unable to see the editor icons nor actually click on the "edit" to change the publishing date or the expiration date. This is a fantastic plugin idea, hope to see it fully functional.

Broke Admin

Plugin adds post expires time after which will be performed actions: add prefix to title, move to drafts or trash.

User Access Expiration vs WP Post Expires