For various reasons you sometimes don’t need or don’t want the JavaScript overhead that comes with the standard “Share On” buttons. I personally find those buttons annoying as they often take a lot of space on a page, are hard to style (alignment) and can be slow to load.
Here is a collection of HTML only links – the way they look in the content.php file of my WordPress template – that you can add to a WordPress post template for your readers to share on Twitter, Google+, Reddit, Flattr & Facebook.

Share on Twitter
<a href="http://twitter.com/home?status=Currently reading <?php the_permalink(); ?> @lroguet" title="Share on Twitter" rel="nofollow" target="_blank">Twitter</a>
Note: you probably want to change @lroguet with your own Twitter username.
Share on Google+
<a href="https://plus.google.com/share?url=<?php the_permalink(); ?>" title="Share on Google+" target="_blank" rel="nofollow">Google+</a>
Share on Reddit
<a href="http://www.reddit.com/submit?url=<?php the_permalink(); ?>" rel="nofollow" target="_blank" title="Share on Reddit">Reddit</a>
“Share” on Flattr
<a href="https://flattr.com/submit/auto?user_id=lroguet&url=<?php the_permalink(); ?>&title=<?php the_title(); ?>&language=en_GB&category=text" title="Flattr this post" target="_blank" rel="nofollow">Flattr</a>
Note: you probably want to change lroguet with your own Flattr username.
Share on Facebook
I don’t have a “Share on Facebook” link at the bottom of my posts because I believe that is not the audience I target with my blog (I might miss a couple of readers but I’m fine with that) but I could as well add one with this line of code.
<a href="https://www.facebook.com/sharer.php?u=<?php the_permalink(); ?>&t=<?php the_title(); ?>" rel="nofollow" target="_blank" title="Share on Facebook">Facebook</a>