Barry Hughes

This plugin works with and depends upon the Shopp e-commerce plugin for WordPress. It is designed to integrate with the 1.2.x branch of Shopp and has been successfully tested with Shopp 1.2.1.
Enough of that, what does it do?
<ul>
<li>Shopp already ships with a widget that can be used to display product categories. This is an alternative to that widget.</li>
<li>Select only those categories that you wish to include, ignore the rest.</li>
<li>Easy to use: simply check the boxes for the relevant categories, choose the display mode (dropdown, regular list etc) and you’re done.</li>
<li>A convenient way to build category-based store menus in the sidebar!</li>
</ul>
This plugin was written by <a href="http://freshlybakedwebsites.net" rel="nofollow ugc">Barry Hughes</a> and can be supported by <a href="http://freshlybakedwebsites.net/say-thanks-with-a-beer/" rel="nofollow ugc">buying the author a beer</a>.

Shopp Custom Categories Widget

Provides an alternative category widget featuring fine grained control for use with the Shopp plugin.

godthor

Maine Hosting

Shopp SEO is developed to bridge the gap between Shopp and WordPress SEO by Yoast. WordPress SEO by Yoast does not integrate with Shopp fully and this plugin fixes that.
Shopp SEO will provide you with meta fields for products and categories within Shopp. Most of the functionality of those fields is handled by WordPress SEO by Yoast and this plugin just provides that data to WordPress SEO by Yoast.
This plugin does remove the native functionality of Shopp with regards to meta descriptions on categories. Shopp creates a meta description for categories based off the category description and disregards WordPress SEO by Yoast. This plugin fixes that so only one meta description is created on a category and that is the one setup by WordPress SEO by Yoast.
Lastly, this plugin adds in the ability for you to setup SEO titles and descriptions for Shopp areas you couldn’t otherwise SEO, like the Shopp landing page, account page, collections and more.
Plugin Requirements
<ul>
<li>Shopp v1.3.4+</li>
<li>WordPress SEO by Yoast v1.6.1+</li>
</ul>
Note: It may work on earlier versions of those plugins but it has not been tested.

Shopp SEO

Ties together the functionality of WordPress SEO by Yoast with Shopp.

Shopp Custom Categories Widget vs Shopp SEO