addthis
wp_enqueue_script( 'addthis', '//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-4ee8386e3c529ef2', array(), 0, true );
<a class="addthis_button_compact" addthis:url="<?php echo get_permalink(); ?>" addthis:title="<?php the_title(); ?>"><span>share</span></a>