WP Maintenance Mode

The WP Maintenance Mode plugin allows you to add a maintenance page to your blog or website, which lets your web visitors know that the site is down for maintenance. You can also add a coming soon page when the website is under development, but with admin rights you have full access to the blog including the front end. When you activate the plugin, only registered users with enough admin rights can view the front end. In addition, you can also include a countdown timer on WordPress WP Maintenance Mode letting visitors know when it will be up and running again.