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.

WPPlugin LLC

Scott Paterson

<h4>Overview</h4>
Note: PayPal Digital Goods is no longer available for new PayPal accounts. This feature remains available for accounts that already have it active. If you have any quetions, please contact PayPal directly.
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The PayPal Digital Downloads WordPress plugin makes it easy to turn your WordPress site into an eCommmerce website and start selling digital products via PayPal.
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Simply install the plugin, enter your PayPal business information on the settings page, and use the automatic button inserter to place PayPal Buy Now buttons on your site.
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PayPal Digital Downloads works with any WordPress theme.
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This plugin is developed by an Official PayPal Partner.
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If you are selling digital goods, this PayPal plugin is a must because it keeps customers on your website by opening a popup window where they can pay. 
This reduces the likelihood of customers leaving during checkout. Unlike most PayPal website integerations that keep customers on your site, no security certificate (SSL) is required.
What makes this PayPal plugin different then others on the WordPress Repository is the level of security built into how the digital files are handled. 
Other plugins render the items URL on the webpage by using MD5 encryption. However the MD5 URL can be easily broken allowing anyone to get your item for free.
What this PayPal plugin does, is it creates a unique hexidecimal string at install. Then in combination with MD5 encrypts your digital products URL into a string capable of being decoded only by your website. This is medical grade encryption and makes obtaining the download URL nearly impossible.
<h4>PayPal Digital Downloads Features</h4>
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<li>Works with any WordPress Theme</li>
<li>Each button has its own product name, price, and download URL.</li>
<li>Built in support for 18 languages (PayPal currently supports 18 languages)</li>
<li>Built in support 25 currencies (PayPal currently supports 25 currencies)</li>
<li>PayPal testing through SandBox</li>
<li>Choose from 4 different PayPal button types.</li>
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WPPlugin is an offical PayPal Partner. Various trademarks held by their respective owners.

PayPal Digital Downloads

Start selling digital products on your site in just a few minutes. No Coding Required. Official PayPal Partner.

DownloadMusic vs PayPal Digital Downloads