Gioowp

<h4>With this plugin you are able to:</h4>
<ul>
<li>Change strings on your wordpress site, from admin panel</li>
<li>Plugin works over other language plugins and can be used together</li>
<li>Plugin works with generated and optimized files</li>
<li>No load on DB while using on site</li>
</ul>
<p>This plugin uses as less scripts and css as possible to avoid traffic load or performance problem, and is as simple as possible.<br />
Some other features will be added in next releases</p>
<h4>Watch the demo</h4>
<span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/n2zCUnUEpts?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span>
<p>Hope you enjoy it.</p>


Simple String Manager

Manage strings/words from admin panel; Use as string translator at multilanguage sites;

hauxh

<p>This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string]<br />
Specify the key in a custom value called “key” with the [string] or use the built in widget.</p>
<p>Stable version of the plugin are pushed to the WordPress repository,<br />
but the latest version of the plugin can be found at:<br />
https://bitbucket.org/excion/wpkeyme/</p>
<p>Issues/Bugs: https://bitbucket.org/excion/wpkeyme/issues</p>


WPKeyMe

This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string]

Simple String Manager vs WPKeyMe