CartNinja

<p>CartNinja.com is a conversion optimized FREE WordPress Shopping Cart with everything you need to start selling online.</p>
<ul>
<li>CART NINJA IS NOW FREE!</li>
<li>ACCEPT CREDIT CARDS FREE (U.S. Only)</li>
<li>ADD PAYPAL EXPRESS PAYMENTS FREE (All Countries supported by Paypal)</li>
</ul>
<h4>Features</h4>
<ul>
<li>Completely Free With No Monthly Fees</li>
<li>Only Pay when you sell: 1.9% + .49cents per transaction</li>
<li>Accept Credit Cards (Visa, Mastercard, Discover, American Express) with Free Same Day Setup & No Monthly Fees</li>
<li>Authorize.net is also supported</li>
<li>Offer Paypal Express Payments in addition to Credit Cards</li>
<li>Get everything set up today!</li>
</ul>
<p>If you have been thinking about starting a store to sell your products then now is a better time than ever with Cart Ninja!  Perfect for small and large size businesses alike, Cart Ninja allows you to start selling with your wordpress website today! Cart Ninja allows you to start selling AT NO RISK TO YOU!</p>
<h4>How it Works</h4>
<p>Cart Ninja combined with WordPress makes it easier than ever to make a store that allows you to sell anything you want online.</p>
<ul>
<li><a href="http://cartninja.com/?utm_source=wordpressplugins&utm_medium=plugins%2Bpage&utm_campaign=wordpressplugins" rel="nofollow ugc">Sign Up For a Free Cart Ninja Account</a></li>
<li>Each Post, Page, or Custom Type will have a Cart Ninja Product Box where you can fill in product information like Price, Thumbnail, Options etc..</li>
<li>You can either use a Template Tag  or the Shortcode [NinjaProduct] to list your product on any post / page on WordPress.</li>
<li>Integrates with virtually any WordPress Theme.</li>
</ul>
<h4>What Can You Sell With Cart Ninja?</h4>
<p>Cart Ninja can sell whatever you set your mind too, here is some good examples:</p>
<ul>
<li>Any physical product (T-Shirts, Shoes, etc.. with option variations supported).</li>
<li>Digital Downloads (Music, eBooks, PDF’s, etc..) with digital encryption.</li>
<li>Whatever you want to sell!</li>
</ul>
<h4>Demos</h4>
<ul>
<li><a href="http://cartninja.com/#demo?utm_source=wordpressplugins&utm_medium=plugins%2Bpage&utm_campaign=wordpressplugins" rel="nofollow ugc">Homepage Demo</a></li>
<li><a href="http://iheartyours.com/" rel="nofollow ugc">Actual Customer Demo</a></li>
</ul>
<h4>Help</h4>
<ul>
<li><a href="http://cartninja.com/dashboard/getting-started.php" rel="nofollow ugc">Cart Ninja “Dojo” (Documentation & Traning)</a></li>
</ul>


CartNinja – WordPress Shopping Cart

Cart Ninja is a lightweight, fully featured, flexible Wordpress Shopping Cart plugin that is optimized to sell your products.

Archetyped

<p>Cornerstone makes WordPress practical for <strong>any type of site</strong> by enhancing its content management capabilities.  Too long have we had to resort to hacks like using categories in menus to build a pseudo site structure (you know what I’m talking about).</p>
<p>Cornerstone enhances your WordPress site in several ways.  One of the most useful features is one that allows WordPress to be used for sites that go beyond just blogging– <strong>Posts in Sections</strong>.  Create a section, add posts to it, they show up when visitors navigate to that section.  Simple as that.  It really is, but because you’re awesome <a href="http://archetyped.com/know/how-to-organize-posts-in-sections-in-wordpress-with-cornerstone/" rel="nofollow ugc">here’s a tutorial on how to do it</a>.</p>
<h3>Thanks for the Support!</h3>
<p>The support from the users that love Cornerstone is huge.  You can support Cornerstone’s future development and help to make it even better by donating or even just by sending me a nice message 🙂</p>
<p><a href="https://gum.co/cnr-donate" rel="nofollow ugc">Donate to Cornerstone</a></p>
<h3>Features</h3>
<ul>
<li>”NEW: Content Types” – Add custom fields to default (posts, pages, etc.) and custom (events, properties, etc.) post types</li>
<li>Posts in Sections (see above for more info.  Why are you reading from the bottom up?)</li>
<li>Structured permalinks – post permalinks are based on the section they are in (e.g. <code>/section-name/post-name/</code>)</li>
<li>RSS for Sections – Let users subscribe to and receive updates for specific sections on the site.</li>
</ul>
<h3>Next Up</h3>
<ul>
<li>Template functionality – enhanced page titles, featured content, etc.</li>
<li>And more, which is where your feedback comes in.</li>
</ul>
<p><a href="http://archetyped.com/tools/cornerstone/" rel="nofollow ugc">Plugin home page</a></p>


Cornerstone

I found the idea of this plugin quite useful so I was tempted to give a five star rating. But the permalink function is not fully configurable and does not work without trailing slashes which in some cases might be wanted. 
Since I found that a central part of the task the plugin should be used for is not functional I only gave it a 3 stars rating.



Does its job but breaks permalinks

Enhanced content management for WordPress

CartNinja – WordPress Shopping Cart vs Cornerstone