This plugin adds a column to the admin plugin's page to show when each plugin was last updated.
Provides a widget that shows last updated posts (also custom post types are supported) in a list. Optionally you can display also the date.
WP lastupdated lets you easily add a shortcode or widget to you site which tells your visitors when the last time your site was updated.
Displays the last updated date for all plugins in the WordPress.org plugins repo.
This plugin generates customizable messages stating the last modification date and time for the whole site and the individual content (if appropriate)