Shoppdeveloper.com

With this plugin installed you can supply your customers with previous/next buttons on the product pages of your Shopp webshop. They will no longer have to go back and forth between category/catalog pages and product pages when browsing a category. You can translate the plugin to your own language, .pot file is included. Dutch language files are already present.
The difference between this plugin’s output and the regular Shopp ‘next,previous’ output is, this plugin’s output will stay inside the chosen categorie. So if your customer is looking at a lamp, browsing the category ‘Yellow’, the next product will also be in the category ‘Yellow’ and not just another product in for example the category ‘Lamp’.
By use of the Shopp tag <code>shopp('product','browser',"show=both&cat=$cat")</code>, you set whether you want to display ‘previous’, ‘next’, or ‘both’. Take a look at the more detailed instructions below.
By use of the settings page, you specify
<ul>
<li>the phrases used for ‘Previous’ and ‘Next’</li>
<li>to use product thumbnails instead of ‘Previous’/’Next’</li>
<li>the size of the thumbnails</li>
<li>to use predefined Shopp image-setting</li>
<li>which categories to exclude (‘Previous’/’Next’-buttons will not appear on those Shopp product pages)</li>
<li>which products to exclude (‘Previous’/’Next’-buttons will not appear on those Shopp product pages)</li>
</ul>

Shopp Product Page Browser

Add "previous/next"-product links to your Shopp webshop's product pages.

Enej Bajgorić

oltdev

Ever wanted your users to see all the pages that they have previously visited. Well now you can!
Here’s how it works:
The value of the current url and an appropriate title of the page are stored in the users cookie. 
As the user browses the site more the number of links stored grows.
<a href="https://codex.wordpress.org/Shortcode_API" title="WordPress shortcode" rel="nofollow ugc">shortcode</a>
You can place the ‘[history-tracker size =”5″ order=”oldest”]’ shorcode into any page or post or 
If order attribute is set to olderst the order will be reversed. 
There is no description or title attribute.

History Tracker

Tracks the history the users visit and displays it to them, like the browser history but only for your website

Shopp Product Page Browser vs History Tracker