Tran Ngoc Tuan Anh

This plugin adds rel=”nofollow” to all external links in post content. So, your flow of PageRank can not run to other websites and your blog’s SEO is improved.
The internal links are unchanged.
Requires PHP5.

External Nofollow

datafeedr

The Cloak Affiliate Links for WooCommerce plugin allows you to mask all external links in your WooCommerce store.
For example, change this… 
 merchant.com/index.php?aff_id=123&product_id=456
… into this: 
 yoursite.com/go/123
Configure the status code for the redirect to either 301, 302 or 307.
The plugin also adds a “Disallow” to your robots.txt file to prevent bots from following those external links.

Cloak Affiliate Links for WooCommerce

I use it for some time now and I am very happy with it! Thanks!

Awesome plugin!

Great plugin

Cloak your WooCommerce external & affiliate links.

External Nofollow vs Cloak Affiliate Links for WooCommerce