Extension:WhosOnline

The WhosOnline extension adds a special page, Special:WhosOnline, which shows the list of all users (optionally including anonymous users) currently viewing the wiki. It creates this list by finding all users who last viewed any page on the wiki less than the time ago specified by the setting $wgWhosOnlineTimeout, which by default is one hour.

Usage
Users who login after the extension is installed can be seen at. Refresh the page if it is blank. It is possible to transclude the contents of the special page into another page:. If you use it will only show 10 users and will have the navigation controls.