Ron Rennick

The document repository is designed to provide a central revisioned repository for documents in WordPress network being implemented as a content management system. However, it can be used in single WP sites and supports cross domain implementation via JSON.
Features
<ul>
<li>Download via permlink – The document post permalink delivers a direct download of the current version of the uploaded document. </li>
<li>Document revisions – On upload of each document, a new revision of the document post is created. Previous versions remain attached to prior revisions.</li>
<li>Version independence – The permalink to the most recent version of the document doesn’t change which enables one time internal or external linking to the document.</li>
<li>Revision download via permalink – Prior versions of the document each have a distinct permalink which delivers a direct download.</li>
<li>Optional custom taxonomies – A custom taxonomy plugin is included to model implementing custom taxonomies with the document post type </li>
<li>Optional custom roles – A custom role plugin is included which permits restricting contributor, author & editor access to document posts based on organizational role</li>
<li>Optiona extras – The extras plugin is included to add a link to document admin to document maintainers’ admin bar & adds a document media type to the edit post area across the network.</li>
</ul>
<a href="http://technology.umw.edu/wordpress101/document-repository/" rel="nofollow ugc">User instructions/documentation provided by University of Mary Washington</a>
This plugin was written by <a href="http://ronandandrea.com/" rel="nofollow ugc">Ron Rennick</a> in collaboration with the <a href="http://umw.edu/" rel="nofollow ugc">University of Mary Washington</a>.
<a href="http://wpmututorials.com/plugins/document-repository/" rel="nofollow ugc">Plugin Page for details</a>

Document Repository

Turn a WordPress site into a revisioned document repository.

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]

Document Repository vs WP Last Modified