atdev

The phpMyDirectory WordPress plugin allows wordpress users to log into phpMyDirectory. The plugin is configured in the WordPress admin area.
Users only need to log in once and they will be automatically logged into phpMyDirectory. This allows phpMyDirectory to be used alongside WordPress and for a directory to be easily created for WordPress.

phpMyDirectory

Allows wordpress users to automatically log into phpMyDirectory.  The sessions are shared and accounts are created automatically if they do not exist.

tronhammer

This plugin will mimic a keep-alive ping by utilizing jQuery to perform an ajax request to the current page, which will update 
the session token tied to PilotPress and or any other system attached using PHP built in sessions. Session Slap will also provide 
a settings interface to allow admins to configure details relating to interval amount (which is defauled to 5 minutes less than the 
session.maxlifetime set in php.ini).
A few notes about the sections above:
<ul>
<li>Configuration options are available in the Settings -> Session Slap menu.</li>
<li>Updates built in PHP sessions only.</li>
<li>Attempts to access session.maxlifetime ini settings, but will default to 24 minutes if not available.</li>
</ul>

Session Slap

Session Slap mimics a keepalive ping by making an AJAX request to the current page to refresh active session timestamp.

phpMyDirectory vs Session Slap