dFactory

<p><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.</p>
<p>For more information, check out plugin page at <a href="http://www.dfactory.co/" rel="nofollow ugc">dFactory</a> site.</p>
<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>
<p>Feel free to contribute to the source code on the <a href="https://github.com/dfactoryplugins" rel="nofollow ugc">dFactory GitHub Repository</a>.</p>


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.

Sparanoid

<p>Media Auto Hash Rename will rename any file (specific files can be ignored by file extension) during upload, with unique, low collision hashes. Hash characters and length can be configured for even lower collision rate.</p>
<p>More information please visit my <a href="https://sparanoid.com/work/media-auto-hash-rename/" rel="nofollow ugc">site</a>.</p>
<p>This plugin provides no configuration GUI to make it more easier to maintain with the future WordPress updates.</p>
<p>Currently there’re 3 constants you can configure in your <code>wp-config.php</code>, I recommend WP-CLI for maintaining these constants.</p>
<ul>
<li><code>MAHR_LENGTH</code>: length of the random hashes, (default to <code>8</code>), longer can help reduce collision. Hashes at the length of 8 can be collision-free at the scale of 50,000 images).</li>
<li><code>MAHR_CHARS</code>: Characters used in hashes, default to <code>0123456789abcdefghijklmnopqrstuvwxyz_</code>, You can add more characters like uppercased alphabelts to dramatically reduce the collision without increasing the length of your filenames. But please note that this option can be dangerous if you’re not familer with general URI encoding. So if you don’t know what characters are allowed in a filename, just keep it untouched and use the default option.</li>
<li><code>MAHR_IGNORE</code>: File extensions to be ignored, default to <code>pdf, zip</code>, you can define a comma delimited list of file extensions to bypass renaming process of this plugin. All files that has the file extension you defined in the list will be ignored. Please note that:
<ul>
<li>File extensions must be defined without the leading peroid, for example: <code>'pdf, 7z, bmp'</code> works, <code>'.pdf, .7z, .bmp'</code> does not.</li>
<li>With (<code>'pdf, zip'</code>) or without (<code>'pdf,zip'</code>) space both work.</li>
<li>If you define your own ignore list, default ignore list will be discarded. For example, if you define <code>'7z'</code>, then <code>'pdf, zip'</code> will be processed during upload. You need to reapply these extensions with your own: <code>'7z, pdf, zip'</code>.</li>
<li>If you don’t need to ignore any files by its extension. define an empty array <code>[]</code> (without quotes) to this option: <code>define( 'MAR_IGNORE', [] );</code> to force process PDF and ZIP files.</li>
</ul>
</li>
</ul>


Media Auto Hash Rename

Rename media filename during upload with unique hash.

Download Attachments vs Media Auto Hash Rename