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

David Miller

Revision Diet is a plugin to limit the number of post revisions that are saved. It does exactly what you expect – it allows you to set a number of revisions to keep for each post and deletes any revisions beyond that number. This number will not include the autosave revisions.
The options page is extremely simple – enter the number of revisions to keep and save your options. There is also a button to ?Trim Excess Revisions.? This button will trim all the extra revisions from every post in your WordPress installation. (Using it is optional.) As for regular use, each time you save a post the oldest revisions on that post will be deleted from the database down to the limit that is currently set.

Revision Diet

Revision Diet is a plugin to limit the number of post revisions that are saved.

WP Revision List vs Revision Diet