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 …

Khanh

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.
Three new field types:
<ul>
<li>PostSeries: link your posts into series and display them with the [series] shortcode, also it comes with 2 widgets</li>
<li>PhotoLink: to be added</li>
<li>PostLink: to be added</li>
</ul>

PostLinks

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.

PalDrop Dropbox Shop vs PostLinks