a div on your theme's Index.template.php right after the <body> tag or right at the beginning of the template_body_above() function should do the trick:
<div> Welcome: ', $context['user']['name'], ' </div>
I dont know what the notifications and settings buttons will do, the other ones are pure text:
<a href="',$scripturl,'?action=profile">My Profile</a> for the my profile link.
<a href="',scripturl . '?action=logout">Log Out</a> for the log out one.
thats pretty much what I can do with the details provided.