xdg-utils binary package in Ubuntu Precise amd64

 xdg-utils contains utilities for integrating applications with the
 desktop environment, regardless of which desktop environment is used.
 They are part of freedesktop.org's Portland project.
 .
 The following utilities are included:
 .
  * xdg-desktop-menu - Install desktop menu items
  * xdg-desktop-icon - Install icons on the user's desktop
  * xdg-icon-resource - Install icon resources
  * xdg-mime - Gather MIME information about a file
  * xdg-open - Open a URL in the user's preferred application that
               handles the respective URL or file type
  * xdg-email - Open the user's preferred email client, potentially with
                subject and other info filled in
  * xdg-screensaver - Enable, disable, or suspend the screensaver
  * xdg-settings - get various settings (default web browser) from
                   the desktop environment

Source package