Smart Maintenance Mode allows you to put your site under maintenance mode for others and you can see the actual developement of your site by allowing
Smart Maintenance Mode Download Now
(If the link does not work)↓
Originals Link WordPress.org
How to Install Smart Maintenance Mode Plugin, Manually
Upload the Smart Maintenance Mode plugin to your blog, Activate it.
That’s it. You’re done!
Plugin Not Working?
If any errors or problems with the plug-in then write comments.