Pete Nelson

This plugin allows you to include a list of revisions when viewing a list of posts, pages, or custom post types in the admin dashboard. It can be configured 
to limit the number of revisions shown, the post types it is enabled for, and a prefix & suffix to wrap around the revision title to offset it from the rest of the list.
Thanks to <a href="https://twitter.com/pat_ramsey" rel="nofollow ugc">Pat Ramsey</a>, <a href="https://twitter.com/zzramesses" rel="nofollow ugc">Corey Ellis</a>, and <a href="https://twitter.com/Nick_Batik" rel="nofollow ugc">Nick Batick</a> for 
encouraging me to write this plugin, and <a href="https://twitter.com/kenziemoss" rel="nofollow ugc">Kenzie Moss</a> for our WordPress icon.

WP Revision List

Show revisions when viewing lists of posts, pages, or custom post types in the admin dashboard

Slaver

Disable revision functions in WordPress and delete all entries of revisions in database. 
It is extremely important to back up your database before install this plugin.

Disable Revisions

Disable revision functions in WordPress and delete all entries of revisions in database.

WP Revision List vs Disable Revisions