Genesis Sticky Social Sharebar (v2.0) (includes tweet, fb like, G+ and buffer buttons. Tutorial link: http://www.blogsynthesis.com/?p=1090) I have just updated the code for the old tutorial. Now it supports Genesis 2.0 and Responsive design. Follow the tutorial for easy installation to your Genesis based Wordpress sites.

button-script.htm

<!-- Place these tags at wp_footer() from Genesis Dashboard. -->

<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>

<script type="text/javascript">
  (function() {
    var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
    po.src = 'http://apis.google.com/js/plusone.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
  })();
</script>

<script type="text/javascript" src="http://static.bufferapp.com/js/button.js"></script>

<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

functions.php

<?php
//* Do NOT include the opening php tag and 
//* Must read the tutorial at http://www.blogsynthesis.com/?p=1090
 
//* Add Sharebar to Posts
add_action('genesis_entry_content', 'include_share_box', 3 );
function include_share_box() {
    if ( is_single() )
    require(CHILD_DIR.'/sharebar.php');
}

gistfile1.js

// Share bar
if ($('body').hasClass('single')) {
  var timeout = null; var entryShare = $('#social-widgets').first(); var entryContent =$('.entry-content').first();
  $(window).scroll(function () {
    var scrollTop = $(this).scrollTop();
    if(!timeout) {
      timeout = setTimeout(function() { timeout = null;
        if (entryShare.css('position') !== 'fixed' && entryShare.offset().top < $(document).scrollTop()) {
          entryContent.css('padding-top', entryShare.outerHeight() + 8);
          entryShare.css({'z-index': 500, 'position': 'fixed', 'top': 0, 'width': entryContent.width()});
        } else if ($(document).scrollTop() <= entryContent.offset().top) {
          entryContent.css('padding-top', '');
          entryShare.css({ 'position': '', 'z-index': '', 'width': ''});
        }
      }, 250);
    }
  });
}

sharebar.php

<?php
//* Do NOT include the opening php tag
 
//* These are the buttons
<div id="social-widgets" class="social-widgets">
	<div class="social-share-txt">Share:</div>

	<div class="social-btn facebook-widget">
		<div class="fb-like" data-href="<?php echo get_permalink(); ?>" data-send="false" data-layout="button_count" data-width="62" data-show-faces="false"></div>
	</div>

	<div class="social-btn google-widget">
		<!-- Place this tag where you want the +1 button to render. -->
		<div class="g-plusone" data-href="<?php echo get_permalink(); ?>" data-size="medium"></div>
	</div>

	<div class="social-btn twitter-widget">
		<a href="https://twitter.com/share" class="twitter-share-button" data-text="<?php the_title(); ?>" data-url="<?php the_permalink(); ?>" data-via="BlogSynthesis" data-related="NetRival">Tweet</a>
	</div>

	<div class="social-btn twitter-widget">
		<a href="http://bufferapp.com/add" class="buffer-add-button" data-text="<?php the_title(); ?>" data-url="<?php echo get_permalink(); ?>" data-count="horizontal" data-via="BlogSynthesis" data-related="NetRival">Buffer</a>
	</div>


</div>
<div class="clear"></div>

style.css

/* Share bar CSS
------------------------------------------------------------ */

.social-widgets {
	background: #f5f5f5;
	padding: 4px;
	margin-bottom: 16px;
	margin-bottom: 1.6em;
	height: 32px;
	overflow: hidden;
}

.social-btn {
	height: 28px;
	vertical-align: middle;
	min-width: 92px;
	display: inline-block;
}

.social-share-txt {
	font-weight: bold;
	float: left;
	margin: 0 12px;
}