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

Hamid Reza Sepehr

Dark mode is a new trend on web design. Desktop apps like Adobe Softwares have already implemented dark mode into their UI, now this plugin adds dark mode/night mode feature into your WordPress installation. Dark mode/Night mode also helps. With version 1.1 now you can select button type, location and activated it on each page you want. Also save last time mode is added that save user choices for the last time. You can also define a period of time in which the dark mode would be automatically active on your website.
Note: 
The free version may have incompatibility with your theme. For a full featured version of the plugin alongside 24/7 technical support, please purchase the Premium version.
<h3>Credit</h3>
Here we thank everyone involved in production, testing and evolution of this plugin. Developers, third parties, online communities and buyers, we appreciate you all. 😎

Go Night Pro | WordPress Dark Mode Plugin

Go Night Pro Dark Mode/Night Mode WordPress Plugin enables dark mode or night mode with multiple options for your website.

Maintenance mode Z vs Go Night Pro | WordPress Dark Mode Plugin