rise0chen

<ul>
<li>Rename by MD5: rename file by md5 when upload</li>
<li>Store Only One: remove unique number in filename</li>
<li>Without siteid: remove siteid in upload path</li>
<li>Disable yearmonth folder: remove yearmonth in upload path</li>
<li>Prevent Deletion: because only store one</li>
</ul>

Unique File

Only store one when the uploaded file is same.

gohar2

With this plugin you can easily convert string into MD5. You can use this feature from wordpress dashboard.
<ul>
<li>Dashboard Based Encryption</li>
<li>Fast Performance</li>
<li>Plugin Settings Page</li>
</ul>

Simple MD5 Generator

Simply convert string to md5, this plugin helps you to convert string into md5 format.

Unique File vs Simple MD5 Generator