SiteLock is much different from using the standard "Site Offline" feature of Joomla. No more need to use the limited site offline or an htaccess file to lock down your site. The Site Lock extension will give you much more flexibility and features.
1) Now sitelock is provides support with the load modules tag to embed Joomla modules of other extensions like ACYmailing modules, etc.
2) Missing language constants in the language file has been defined now.
Language file updates for easier translation of admin screen.
Added Joomla update notification
Added new features for page title, background color, background image, and show/hide login form setting.
Fixed bug with css for login form.
Initial release for Joomla 3