Sparanoid

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.
More information please visit my <a href="https://sparanoid.com/work/media-auto-hash-rename/" rel="nofollow ugc">site</a>.
This plugin provides no configuration GUI to make it more easier to maintain with the future WordPress updates.
Currently there’re 3 constants you can configure in your <code>wp-config.php</code>, I recommend WP-CLI for maintaining these constants.
<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.

reza19

This plugin shows you , hits of your download . You can add 5 mirrors server for your files.
Languages:
<ul>
<li>Persian <a href="http://rezaonline.net/blog/" title="رضا شیخله" rel="nofollow ugc">Reza-Sh</a></li>
<li>English <a href="http://rezaonline.net/blog/" rel="nofollow ugc">Reza-Sh</a></li>
</ul>
Send email to me for your language Translations pack: reza19sh[a]gmail[dot].com 
(In plugins package have .pot file)
Features:
<ul>
<li>Counts your download files</li>
<li>Easy installation and use</li>
<li>Settings for best viwed</li>
<li>Have a simple download chart</li>
<li>You can add 5 mirrors link for your file</li>
</ul>
Usage:
<ol>
<li>upload your file in max 5 servers like 4shared , …</li>
<li>go to add files in plugins menu and fill it ,</li>
<li>In your post/page for viewed list of mirrors use [dlmc id=”1″] </li>
<li>In your post/page for viewed hits of downloaded files use [dlmc countid=”1″]</li>
</ol>
<h3>Development Blog</h3>
<a href="http://www.rezaonline.net/blog/" title="رضا شیخله" rel="nofollow ugc">RezaOnline WordPress Plugins Development Blog</a>

Download-Mirror-Counter

Enables you how many times a files (in one of 5 mirrors server) had been downloaded.

Media Auto Hash Rename vs Download-Mirror-Counter