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Common Links allows you to add regularly used links to the search results when linking text content of your post.
Add your common links from the Tools menu. Then, when linking content, begin typing the link title or URL to pull up and insert the link.
Note: Entering <code>.</code> when querying links will not return results. Use spaces instead to match URLs.

Common Links

Adds custom links to the editor's link query

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!

Cloak your WooCommerce external & affiliate links.

Common Links vs Cloak Affiliate Links for WooCommerce