Mitch

The most lightweight WordPress solution for quick maintenances. This plugin adds a maintenance option to your settings menu.
Features:
<ul>
<li>The admin bar maintenance button will become red to indicate that you have maintenance mode enabled so you’ll never forget to turn it off</li>
<li>Customize your own page – after that, you will be able to set it as your maintenance page</li>
<li>Administrators will still have access to the front-end of the website while the website is under maintenance</li>
<li>Lightweight, healthy code and very compact: that’s what makes this plugin so awesome!</li>
<li>Auto Disable (optional); Automatically turn off maintenance mode at the chosen date: you can also put the <code>easy-maintenance</code> shortcode in one of your pages to display the Auto Disable date to your visitors</li>
<li>Support for Genesis Framework and Contact Form 7: You are able to add a contact form to your maintenance page</li>
<li>This plugin will automatically use the style of your theme</li>
</ul>
No premium versions, no advertisements or hidden credits. This plugin will always stay lightweight and there won’t be any unnecessary code and/or features added.
I appreciate your review!

Easy Maintenance

The most lightweight WordPress solution for quick maintenances.

webrangers

It clears whole Sucuri cache for desired domain with one click. 
Clear is done from WordPress admin panel or plugin’s page. Current version contains functionality which purges individual files by URL and clears Sucuri cache after Save Post action.
THINGS YOU NEED TO KNOW:
<ul>
<li>To make this plugin work you have to get Sucuri account first. Obviously 🙂</li>
</ul>

Easy Maintenance vs Clear Sucuri Cache