tradebit

The fastest way to sell files hosted on Dropbox! With this plugin you will get:
<ul>
<li>a free Paldrop merchant account (for up to 10 registered products)</li>
<li>an integrated button in your admin panel to fire up the member area</li>
<li>a sidebar widget, that links with your ID to paldrop and lists your products</li>
</ul>
Paldrop.com is the standard way to sell files hosted on Dropbox and gives you 
access to millions of legal digital goods that you may additionally add to your 
blog.
Read more about the <a href="http://www.paldrop.com/" title="Downloads" rel="nofollow ugc">Paldrop features</a> 
here. The current version provides English accounts and will be enhanced to 
other languages down the road.

PalDrop Dropbox Shop

PalDrop allows you to add a simple and fast payment button for your Dropbox files! It combines your Paypal email with your Dropbox account and enables …

Sjehutch

Browser Push Notifications By Passbeemedia – Send Push notifications to the browser We have built a one stop shop for sending push notifications to the browser .
Push Plugin Features:
<ul>
<li>Safari Web Push – Take advantage of web push (Desktop Push Notifications) on OS X Mavericks.</li>
<li>Detailed Analytics – Detailed Charts Built into your wordpress plugin</li>
<li>Send A Manual Post – Send Notifications to all your users manually </li>
<li>Schedule – Your Posts only get pushed when they are published </li>
</ul>
Its all FREE …

Passbeemedia Web Push Notification

Browser Push Notifications By Passbeemedia - Send Push notifications to the browser

PalDrop Dropbox Shop vs Passbeemedia Web Push Notification