matsuoshi

Maintenance Mode for Non-administrator login users. 
This plugin block access to Admin-page by Editor, Writer etc. 
Only Administrator can access the Admin-page while this plugin is active.
Meanwhile, this plugin doesn’t block visitors’ access to the site.

Admin Hot Maintenance Mode

Maintenance Mode for Non-administrator login users. Only Administrator can access the Admin-page.

zipbreake

WCS Web Maintenance is a lightweight, elegant and powerful solution that allows you to change a website to “Under Construction” or “Site closed for maintenance” while you can make changes to the content, design and configuration.
<h4>Features</h4>
<ul>
<li>Configure text message and color styles</li>
<li>For administrators, add a widget to “Dashboard”</li>
<li>Customize type of users for those who must restrict access to the site</li>
</ul>
Supported languages:
<ul>
<li>English (EN)</li>
<li>Spanish (ES)</li>
</ul>

WCS Web Maintenance

Add feature "Under Construction" or "Site closed for maintenance"

Admin Hot Maintenance Mode vs WCS Web Maintenance