ulfben

When your readers follow links from your blog, the linked site can see where they come from. Thus; your blog is known by every site you’ve ever linked to.
WP-HideRefer adds proxies to your outgoing links, keeping your site private!
There are many plugins to anonymize links. What makes WP-HideRefer better is:
<ul>
<li>it’s 100% WordPress API compliant</li>
<li>it’s entirely server-side (= cacheable & no JavaScript!)</li>
<li>therefore; supports <a href="https://wordpress.org/extend/plugins/infinite-scroll/" rel="ugc">infinite-scroll</a> (AJAX / streaming)</li>
<li>it correctly filters your feeds and comments</li>
<li><a href="https://wordpress.org/extend/plugins/wp-hiderefer/faq/" rel="ugc">it can handle your manually anonymized links</a>!</li>
</ul>
//<a href="http://www.ulfbenjaminsson.com" rel="nofollow ugc">Ulf Benjaminsson</a>
(Please note that WP-HideRefer requires PHP 5 or newer.)
<h3>Additional Notes</h3>
Copyright (C) 2012-2019 Ulf Benjaminsson (hello at my full name dot com)
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2 of the License, or 
(at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

WP-HideRefer

WP-HideRefer adds proxies to your outgoing links, keeping your site private!

Hansdeboeck

You can use this plugin to prevent your site from appearing in the server logs of referred pages as a referrer. The operators of the referred pages cannot see where their visitors come from any more.
For example, this plugin will automatically convert all external links to this format http://cube.hacemedia.be/url/?http://example.com.
This is an anonymous link to example.com which prevents the original site from appearing as a referrer in the log files of the referred page.
Information:
Reliability Hide the referrer from linked sites ? the ?Referer? header will always be blank.
Speed No waiting pages ? no slowdown.
No Ads Links are free of advertisements.
Security All traffic is encrypted using SSL.
(Based on the WP Blank Referer by blackhatzen)

Anonymize Cube

Anonymize all your external links with the Cube service.

WP-HideRefer vs Anonymize Cube