KaeruCT

<p>This plugin allows passwords for password-protected pages/posts to be passed directly through the URL.</p>
<p>The query string parameter that should contain the password is <code>pw</code>.</p>
<p>For example, if the URL of your post is <code>http://myblog.com/password-protected-page/</code> and the password is <code>PASSWORD</code>,<br />
then just append <code>?pw=PASSWORD</code> to it.</p>
<p>If the URL already contains a query string (for example, <code>http://myblog.com/?p=5</code>), then be sure to append <code>&pw=PASSWORD</code> instead.</p>


Password Passthrough

This plugin allows passwords for password-protected pages/posts to be passed directly through the URL.

lucasbustamante

<p>Hide your entire wordpress website behind one simple password.</p>
<h4>Very lightweight plugin:</h4>
<ul>
<li>Only 28kb in size.</li>
<li>No external CSS.</li>
<li>No external Javascript.</li>
</ul>
<h4>Features:</h4>
<ul>
<li>Easy. Hide your entire wordpress website behind one simple password.</li>
<li>Beautiful. You can set your own logo and background.</li>
<li>Secure. Authentication is done through unique tokens stored in the database and checked against the visitor’s browser.</li>
<li>Brute force protection.</li>
<li>Easily translate all front-end strings on Settings.</li>
<li>Few other options, such as Allow visitor to request password, etc…</li>
</ul>
<h4>Github:</h4>
<p>https://github.com/Luc45/Very-Simple-Password-for-Wordpress</p>
<p>This is a FREE plugin with all features included.</p>


Very Simple Password for WordPress

First review

Better than the other plugins of this sort I tested with focus on security and well thought options.

Very good

Keep it simple... sweet :-) 

Keep going thanks ! 

KISS

A simple and lightweight password protection for Wordpress.

Password Passthrough vs Very Simple Password for WordPress