starblank

This free plugin shows next and previous product in single product view in same category.
Installation
Simply upload the .zip file into wordpress, then activate the plugin. A new submenu called Next/Previous Product will on Woocommerce Options left bar. 
This plugin requires Woocommerce in order to run. 
Has been tested with the new Storefront Woocommerce theme and is fully compatible with DIVI framework.
How to use
–Free Version allows: 
Show the previous and next product on the single product view of your store, from the same category, on the top the page.
—<a href="http://starblank.com/en/next-previous-products-for-woocommerce-premium/" rel="nofollow ugc">Premium Version allows:</a> 
-You can choose the location of the next /previos product links: 
 * Over the product 
 * At the bottom of the page 
 * Over the product description 
 * Below product description 
 * Floating in both sides of the screen
-Choose what product will be seen: 
 * Show only products from same subcategory 
 * From same category 
 * Show random products
<ul>
<li>
Show the image and/or the title of the product, all fully customizable in color and size
</li>
<li>
Allows you to use custom arrows instead of default ones
</li>
<li>
and much more!
</li>
</ul>
<a href="http://starblank.com/en/next-previous-products-for-woocommerce-premium/" rel="nofollow ugc">You can get the premium version here</a>
Have fun!

Next / Previous Product for Woocommerce FREE version

This free plugin shows next and previous product in single product view in same category. Installation Simply upload the .

Jam Viet

Your website sometime has many category and subcategory, it’s okey if Category has 2 sub category, but it’s will be bad if category has more than 3 children, this simple plugin will help you shorten all of them to a nicer permalink.
A permalink with a depth of more than 3 levels doesn’t look too user friendly. Additionally, Google may not worry much about URL depths, though it may impact searches on other engines like Bing or Yahoo. This plugin help you shortening deep subcategory’s link !
Eg: 
 //domain.com/category-parent/subcategory/subofsubcategory/last-subcategory.html 
Now it’s will be: 
 //domain.com/nameof-the-category.html
You can choose the end of the Url, can be html or htm or something like “.jam” is okey !
This plugin work with Yoast SEO also, no worry about anythings !
After active this plugin, you have to go to Admin > Setting > Permalinks to set-up suffix for Category link, or plugin will do nothing, suffix can be anything, eg: “.html” or “.asp” or even “.amazon”
Now the best way to setting main custom structure is “/%postname%” without the ‘/’ at the ending of URL, so the category’s link after shorten will have no slash at the end.

Shorten Sub-category's Link

This plugin help you shorten subcategory's link if it's too long or deep levels, help you boosting your SEO

Next / Previous Product for Woocommerce FREE version vs Shorten Sub-category's Link