wokamoto

The plugin optimize Your WordPress Database Tables regularly.

Table Optimizer

The plugin optimize Your WordPress Database Tables regularly.

gerrygooner

This WordPress plugin will cleanup your WordPress database, performing the following actions:
<ul>
<li>Remove all post revisions.</li>
<li>Remove all spam comments.</li>
<li>Remove all unapproved comments.</li>
<li>Remove all unused tags.</li>
<li>Remove all unused post meta.</li>
<li>Optimize MySQL tables by removing all unused table space.</li>
</ul>
Based on WP-Cleanup by JortK, this plugin replaces usage of mysql_query() that was deprecated in PHP 5.5 with WP_Query functions .

Table Optimizer vs WP-CleanDB