Cunjo Social Plugin is a free, pretty, flexible and mobile ready Social Share Plugin with powerful social analytics.
This plugin used to be fantastic, but due to ongoing problems it has quickly gone downhill. Would love to use this again if it ever gets fixed.
Stopped working for me in late June 2014. Just completely disappeared, and it appears that they've gone out of business/stopped supporting the plugin.
I tried with 5 different accounts and never got the confirmation e-mail, checked Spam folder. Without this, the plugin was useless to me.
When I click on the !Share button on the share bar I get a SSL cert warning because the cert domain doesn't match the subdomain it links to :( Also, it pulls images and JS from cunjo.com which is slow and causes hangs. All resources should be local. If these items get fixed I'll change my rating.
I liked the plugin but I had formatting issues in a mobile browser so went back to the Jetpack share system. With !Share, the share buttons were displayed on top of the post text.