An extremely handy feature of Gabber is found in the Send Contact(s) dialog. This dialog allows contacts from the roster to be easily sent to other users.
After loading the dialog from the User Context menu, drag users from the main roster to the list in the dialog. Then information about the user can be displayed or the contact can be removed from the list. When all of the desired contacts are added, click the Send button to send the list to the specified user. As a small warning, there will be no confirmation if the list is received or not.