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!

k0nsl

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 originate from.
For example, this plugin will automatically convert all external links to this format http://anonymizer.mastrcoder.com/index.php?q=http://k0nsl.org/
This produces an anonymous link to k0nsl.org which prevents the original site from appearing as a referrer in the log files of the referred page. This will apply to all external links – except for the ones you decide to exclude.

mastrcoder anonymizer

Anonymize all your external links with the mastrcoder anonymizing service.

WP-HideRefer vs mastrcoder anonymizer