Get list of badges on this site that nobody received yet
JavaScript with jQuery (loaded onto SE sites by default), 58

$('.badge',$('.badge-count:not(:has(*))').parent()).text()


Must be run on https://codegolf.stackexchange.com/help/badges. ;)

Strictly conforming output, 116 chars:

[].join.call($('.badge',$('.badge-count:not(:has(*))').parent()).map(function(){return $(this).text()}).sort(),'\n')


Screenshot of console output (click to enlarge):