WP Clean Up Optimizer will extensively clean up your WordPress database along with Optimizing without manual queries.
Optimizes the WordPress Database after Cleaning it out
Just another DD plugin. Manage your roles and capabilities easy. See who's online and track the history.
Cleanup Duplicate Meta gives you a tool to check for and delete duplicate Post and/or User Meta entries in the database tables.
WUCO aka WP Ultimate Cleanup & Optimization, a free easy to use yet effective plugin designed to help you keep your MySQL database clean.
WP-Sweep allows you to clean up unused, orphaned and duplicated data in your WordPress. It also optimizes your database tables.
Help you clean out redundant & repetitive post revisions and thin out the database.
The Nova Dashboard Cleanup removes all those unwanted dashboard Widgets.