OSM Maintenance will allow you to put your WordPress site in Maintenance Mode.
Simple maintenance mode for a site.
Adds a meta box to the post edit screen that shows all internal links from other posts to the currently displayed post. This way you can easily check
Adds a nifty widget to your dashboard from which you can put your website in maintenance mode.
Provides an interface to make a WPMS network unavailable to everyone during maintenance, except the admin.
Use our awesome Maintenance Mode (Coming Soon) plugin while you work on building your website.
Ability to enter maintenance lockdown mode: force-logout all non-administrators, prevent logins from non-administrators, and disable commenting.
Makes sure your entire website is fully cached at all times. Can be used when performing website maintenance/construction.
Take stock of the page templates that your theme has: what is being used and what is not.
Currently only in Ukrainian translation!
Notify your visitors when you're updating your blog by showing a nice message in the page.
Displays offline/online status of defined (game)servers in your blogs sidebar
adds a splash screen to your site for construction or maintenance reasons. Has a configurable countdown.
Make your blog private? Block everyone, even registered users. Or a selection of them... Need a maintenance mode? Or just want the site to youself.. I
Uses WP "pseudo-cron" system to automatically purge OpenX statistics data.
Display a splash page to tell your visitor that your site is currently under maintenance.
Lock out users from accessing your website while performing upgrades or maintenance to your website, while still allowing certain user roles access.
A plugin that redirects you to a post with no tags (or failing that, a random post) so that you can add tags to those old posts of yours.