mcmwebsol

Protects uploaded files so they can only be viewed by logged-in users
This plugin does not work with the media library. It only protects files uploaded through the plugin itself.
Requires a web server that supports .htaccess files for access control, such as Apache on Linux. Please note that even Apache on Linux 
disables .htaccess files in newer versions in some configurations, so please check to make sure your files aren’t publicly accessible. 
You can test that your files are protected by using the wp-content/uploads/ path or 
 by using the “Test link security” link on the “List all protected uploads” page. You should receive a 403 Forbidden error 
 if it’s working correctly.
This plugin does not collect any private data itself though it’s possible logged-in users may upload private data to your website using this plugin.
PRO SUPPORT 
While we attempt to provide basic support for this plugin here on the WordPress.org forums, for advanced or priority support please use the pro version. 
The <a href="https://www.mcmwebsite.com/mcm-protected-file-view-pro/" rel="nofollow ugc">pro version</a> also adds per user role file permissions, so, for instance, you can have a file that’s only accessible to a premium role, while not accessible to a basic role.

MCM Protected File View

Protects uploaded files so they can only be viewed by logged-in users

dFactory

<a href="http://www.dfactory.co/products/download-attachments/" rel="nofollow ugc">Download Attachments</a> is a new approach to managing downloads in WordPress. Instead of bloated interface it enables simple, drag & drop and AJAX driven metabox where you can insert and manage your Media Library files and automatically or manually display them after, before or inside posts content.
For more information, check out plugin page at <a href="http://www.dfactory.co/" rel="nofollow ugc">dFactory</a> site.
<h4>Features include:</h4>
<ul>
<li>Automatic or manual download links display</li>
<li>Select post types where Download Attachments should be used</li>
<li>Select list, table or sortable, dynamic table display style</li>
<li>Downloads count</li>
<li>Advanced attachments sorting</li>
<li>Most Downloaded Attachments widget</li>
<li>Drag & drop files ordering</li>
<li>Based on Media Library attachments</li>
<li>Easy customisation of Frontend & Backend display</li>
<li>Pretty URLs for download links</li>
<li>Encrypt URLs by default</li>
<li>Customizable tamplates engine</li>
<li>Custom download slug</li>
<li>Custom permission for metabox display</li>
<li>Option to exclude selected attachments from display</li>
<li>Option to select from all Media Library files or only those attached to a post</li>
<li>2 shortcodes</li>
<li>5 functions and multiple filter hooks for developers</li>
<li>Option to use attachment caption and/or description for download links description</li>
<li>Compatible with WPML & Polylang</li>
<li>.pot file for translations included</li>
</ul>
<h4>Get involved</h4>
Feel free to contribute to the source code on the <a href="https://github.com/dfactoryplugins" rel="nofollow ugc">dFactory GitHub Repository</a>.

Download Attachments

Download Attachments is a new approach to managing downloads in WordPress. It allows you to easily add and display download links in any post or page.

MCM Protected File View vs Download Attachments