This plugin was created to allow readers to download music that has been uploaded to a blog from a single page.
The plugin looks through the posts table in the wordpress database for all attachments that have a mime type of audio/*. It displays this when the reader looks at a page ( not a post ) named ‘Downloads’. The reader can then select the songs they wish to download, click on “Download All Selected” and download a zip file of all of the files selected, or they can simply download the single song they wish to listen to. The list also lets users view the attachment page for a particular song, letting them leave comments.

DownloadMusic

Plugin to list all audio files uploaded to a blog, and let users download them in a zip file.

wpdevelop

oplugins

Secure Downloads plugin generate secure download links for protected files and can send emails to your clients for downloading. 
Links can expire after a predefined time, and you can set IP lock for specific download. Download links does not show real location of files at your server. 
You can track every download of files by receiving email about file download with detailed info about download.
<blockquote>
<a href="https://oplugins.com/plugins/secure-downloads/" title="Secure Downloads Homepage" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://oplugins.com/plugins/secure-downloads/#support" title="Support" rel="nofollow ugc">Support</a>
</blockquote>
<h4>FEATURES</h4>
<ul>
<li>Securely distribute your files and track every download.</li>
<li>Upload your files via familiar WP interface.</li>
<li>Define Title, Description and Version Number at “Attachment details” for your protected files</li>
<li>Plugin upload files into secure, protected folder. Website visitors will not have direct access to such files.</li>
<li>Generate secure links to your protected files, which does not show real location of file.</li>
<li>Links can expire after specific time.</li>
<li>Links can be locked to specific IP or IP mask (network).</li>
<li>Configure email template with different parameters.</li>
<li>Send emails to your customers with secure links for download your protected files.</li>
<li>Monitor downloading of each file, by receiving email notification about file download with detailed info about download.</li>
<li>Fast configure your protected files via CSV form. Useful for saving or editing list of files in one form.</li>
<li>Easy reorder list of files via drag and drop interface.</li>
<li>Configure URLs for pages with warning, like “link expired notice”.</li>
<li>Mobile friendly.</li>
</ul>
<h4>SECURE DOWNLOADS IS GREAT FOR</h4>
<ul>
<li>Distribute you files after purchase</li>
<li>Delivery updates of your products to your customers</li>
</ul>

Secure Downloads

Easy generate and distribute secure links for file downloads, that can expire, and track every download.

DownloadMusic vs Secure Downloads