tradebit

The ultimate plugin to upload and sell digital goods like photos, MP3 music or 
website templates. With this plugin you will get:
<ul>
<li>a free Tradebit merchant account (waives the $4.95 activation fee)</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 tradebit and lists your products</li>
</ul>
Tradebit.com is the marketplace for digital goods and gives you access to 
millions of legal digital goods that you may additionally add to your 
blog.
This plugin gives you secure storage space of 99 Gigabytes on tradebit to 
host your digital inventory and includes the option to integrate affiliate 
links to the existing catalog on tradebit.
Read more about the <a href="http://www.tradebit.com/digital-goods-marketplace.php" title="Download Shop" rel="nofollow ugc">Tradebit features</a> 
here. The current version provides English accounts and will be enhanced to 
other languages down the road.

Tradebit Download and Affiliate Shop

Tradebit is the leading platform to publish and sell digital goods like photos and music. This plugin integrates it into your Wordpress blog!

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.

Tradebit Download and Affiliate Shop vs PostLinks