Google Plus One
From Wiki.cyring.fr
header.php
<body <?php body_class(); ?>> ... <script type="text/javascript"> window.___gcfg = {lang: '<?php echo qtrans_getLanguage() ?>'}; (function() { var po = document.createElement("script"); po.type = "text/javascript"; po.async = true; po.src = "https://apis.google.com/js/plusone.js"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(po, s); })(); </script> ...
loop.php
<div class="entry-utility"> ... <g:plusone size="small" href="<?php the_permalink(); ?>"></g:plusone> ... </div><!-- .entry-utility -->