Udit Desai

Following are some of the trivial features:
<ul>
<li>Tracks Post Title & Post Content – inherits from WordPress Core</li>
<li>Controls number of revisions for all post types</li>
<li>Tracks Post Author</li>
<li>Tracks Post Date</li>
<li>Tracks Featured Image</li>
<li>Tracks Comments for a Post</li>
<li>Tracks Metadata</li>
<li>Tracks Terms from Taxonomy</li>
</ul>
NOTE: Development in progress
Important Links ( Future Links – doesn’t exist right now )
<ul>
<li><a href="http://blog.incognitech.in/watchman/" title="Visit Watchman's Homepage" rel="nofollow ugc">Project Homepage</a></li>
<li><a href="http://blog.incognitech.in/watchman/roadmap/" title="Visit Watchman's Roadmap page" rel="nofollow ugc">Roadmap</a></li>
<li><a href="http://blog.incognitech.in/watchman/docs/" title="Visit Watchman's Documentation page" rel="nofollow ugc">Documentation</a></li>
<li><a href="http://blog.incognitech.in/watchman/faq/" title="Visit Watchman's FAQ page" rel="nofollow ugc">FAQ</a></li>
<li><a href="http://github.com/desaiuditd/watchman/" rel="nofollow ugc">GitHub</a> – Please mention your wordpress.org username when sending pull requests.</li>
</ul>

Watchman

Watchman is a WordPress plugin which keeps track of revisions for your posts, pages and custom post types as well.

Dogan Ucar

WP Last Modified adds the ‚last_modified_date‘ shortcode to your WordPress installation. This shortcode shows the last timestamp of your post/page. Simply use the „format“ attribute for custom date formats (it uses PHP’s date() function). 
The “description” attribute enables a brief description which changes has been made with the last modification. 
WP Last Modified shows also the actual revision of and the publication date of the post/page. 
You can customize the text which will be shown under each post/page under settings -> WP Last Modified Settings. You can also hide one of the elements if you do not want them.
With version 1.1.0, WP Open Last Modified was renamed to WP Last Modified.
Features:
<ul>
<li>last modification timestamp of a post/page</li>
<li>publication timestamp of a post/page</li>
<li>timestamp format customizable</li>
<li>revision count</li>
<li>custom text with placeholders</li>
<li>last modification description</li>
<li>excluding single posts/pages from displaying the last modification timestamp</li>
</ul>

WP Last Modified

This plugins adds the last modified date, current revision and the publication date of your post/page. Simply use the shortcode [last_modified_date]

Watchman vs WP Last Modified