Ben Casey

Manage Your Auto Save And Post Revisions From The Admin Interface.
Under Settings -> General There are 3 new options to manage this WordPress functionality.

WP Auto Save Management

Manage Your Auto Save And Post Revisions From The Admin Interface

JortK

This WordPress plugin will cleanup your WordPress database, which means that it will perform the following actions:
*Remove all post revisions
*Remove all spam comments
*Remove all unapproved comments
*Remove all unused tags
*Remove all unused post meta
*Optimize MySQL tables by removing all unused table space

WP-Cleanup

This Wordpress plugin will cleanup your Wordpress database by remove all unused data from your database.

WP Auto Save Management vs WP-Cleanup