csfeijo

ContentShare use the API features of Twitter and Facebook to possibility add this buttons on your blog. 
For more informations about this features see the API URLs of this Social Networks.

ContentShare

ContentShare add buttons to share on Twitter and Facebook (Share and Like) on home page of your blog and on each post.

MikesPickz

The MP Share Center allows you to easily add share buttons to your posts and pages.
The plugin will add Facebook Like, Twitter Tweet, LinkedIn Share, Pinterest Pin, Pocket and email buttons or boxes, above or below the front page/post/page/archive/search pages if you enable these options.
For the Facebook Like Button, the plugin will automatically take the first image from a post and use that as the thumbnail.
This plugin loads Javascript in the footer, which improves page load (by allowing content to appear first) and therefore benefits SEO and search engine ranking.
You can display the MP Share Center on any page type with the use of the shortcode <code>[mp_share_center]</code>. The shortcode defaults to use the buttons format. To choose the boxes format, simply add the <code>type='boxes'</code> parameter, ie: <code>[mp_share_center type='boxes']</code>. If you want to insert the call to action via the shortcode, use <code>[mp_share_center type='cta']</code>. Which social networks the shortcode displays is controlled on the MP Share Center Settings page.

MP Share Center

The MP Share Center allows you to easily add share buttons to your posts and pages.

ContentShare vs MP Share Center