Aleksandr Zelenin

Plugin adds so desired Maintenance mode. And it so easy for you.
<ul>
<li>easy settings</li>
<li>4 strict and funny templates</li>
<li>custom image slider</li>
<li>time based maintenance</li>
<li>custom logo and custom text</li>
<li>social icons</li>
</ul>
For advanced users:
<ul>
<li>access rules by IP and user</li>
<li>custom css</li>
</ul>

Maintenance mode Z

Maintenance mode for WordPress with many settings

Sirius Pro

Simply enable maintenance mode and redirect users to custom message. This plugin allows you to enable maintenance mode for a specific date range without modifying the code and it works with most of the available themes. Just install and activate this plugin to enable maintenance mode and redirect all users.
Read more about this plugin on <a href="https://siriuspro.pl" rel="nofollow ugc">WordPress</a> blog.

Maintenance Mode Redirect

Simply enable maintenance mode, redirect logged in user and show custom message instead of WordPress homepage.

Maintenance mode Z vs Maintenance Mode Redirect