Jack Reichert

Relying on hit counts simply does not reflect the impact of your posts. SharePulse finds and ranks your site’s posts that have the greatest social impact. The stats are gathered by getting the Twitter share count, Facebook share count, LinkedIn share count as well as your own site’s most commented posts measuring actual engagement. SharePulse lets you display these posts in your site’s sidebar showing off your posts which have had the greatest social impact over the past day, week, month year or for all time. Each post is displayed with the total number of tweets, shares and comments.
Note: This is the alpha for the plugin relaunch. Feedback is crucial, so please don’t hesitate. We have a feature roadmap and <a href="http://sharepulse.net/contact/" rel="nofollow ugc">we want your input</a>.
The Facebook api has been tightened, it may not update each time. I’m working on a fix.
<h3>Settings</h3>
Widget title SharePulse allows you to customize the widget title
Date range: You can choose to display the stats from the past day, month, week, year or all time.
Number of posts to display: You can choose the number of posts to display in the widget. You can preview each option’s stat count from “SharePulse > SharePulse” in the admin menu.
Allow linkback at bottom of widget: We did not ask for payment to develop this widget yet we are sharing it freely, if you like it please show your appreciating by allowing the linkback.

SharePulse

SharePulse ranks in a widget your site's posts which have had the greatest share count, using Twitter, LinkedIn, Facebook and your comments.

inboundrocket

jcvangent

Selection Sharer makes it super easy for your readers to share your content and drive new visitors to your site. With Selection Sharer, any visitor on your website/blog can easily 
highlight any part of your content and share it immediately on Twitter, Facebook, LinkedIn or via email. Ultimately, the more your readers share, the more new traffic your site will get.
When a visitor highlights some text on your WordPress website they will be presented by a Medium like popover menu to share their highlighted content. This plugin supports both desktop (with a pop-over) as well as mobile devices (with a pop-under). This plugin is made possible by the excellent work done by <a href="https://github.com/xdamman/selection-sharer" rel="nofollow ugc">@xdamman</a> and is based on his code.

Selection Sharer by Hans van Gent

Works great!

Medium like popover menu to share on Twitter, Facebook, LinkedIn or by email any text selected on the page.

SharePulse vs Selection Sharer by Hans van Gent