PixelAlb

Notifies your visitors about you updating the blog.
<a href="http://pixelalb.ro/" rel="nofollow ugc">Questions? Contact me!</a>
Some features:
<ul>
<li>Displays a nice message at the top of your blog pages</li>
<li>Able to blink</li>
<li>Fullscreen mode</li>
<li>In page positioning</li>
</ul>
Follow me on Twitter to keep up with the latest updates <a href="http://twitter.com/pixelalb/" rel="nofollow ugc">Stegaru Victor</a>

Maintenance Mode Notify

Notify your visitors when you're updating your blog by showing a nice message in the page.

Simon

This plugin can send a alert message by LINE Notify

WP LINE Notify

This plugin can send a alert message by LINE Notify.

Maintenance Mode Notify vs WP LINE Notify