Amadeu Arderiu

Sirvelia

A simple WordPress plugin that helps protecting the site’s content from humans and bots.
There are some protections available:
<ul>
<li>Disable Contextual Menu: disable right mouse button click site-wide</li>
<li>Disable Text Selection: disable the ability to select text throughout the site</li>
<li>Disable Feed: 
disable the content feed provided by WordPress</li>
<li>Disable Iframe Embedding: 
prevents embedding any website URL in an Iframe</li>
<li>Protect REST API: protect the REST API for only logged in users</li>
</ul>
Admin settings are available in Settings/Content Protection.

Protect My Content

A simple WordPress plugin that helps protecting the site's content from humans and bots.

fpoller

Gives the following options for making the WordPress installation more private:
<ul>
<li>Protect content from being viewed to users who hasn’t logged in</li>
<li>Disable all feeds</li>
<li>Only serve uploaded files to logged in users</li>
<li>IP address based exceptions for the above options</li>
</ul>

Private WP suite

Adds option in the admin panel for making your blog (including rss feeds and uploaded files) private.

Protect My Content vs Private WP suite