renemanqueros

Allows users to log in to WordPress using Google+ or Facebook. 
Adds a configuration panel under Settings where users can set API keys. 
Upon successful login, depending on the service, users will be redirected to either:
— www.mywebsite.com/facebookcallback/ 
— www.mywebsite.com/googlecallback/
<ul>
<li>Trailing slash is mandatory. 
After that the user will be sent to the destination url set in the Settings panel.</li>
</ul>
<h3>Theming</h3>
Both links have a common CSS class: “gp_sociallogin”. 
Google’s login link has a specific class: “google”. 
Facebook’s login link has a specific class: “facebook”.

GP social login

Allows users to log in to Wordpress using Google+ or Facebook.

SFlack

Like & Share My Site (LSMS) is a plugin that will allow you to have social ‘like’ and ‘share’ buttons added to the end of your posts. Currently it can display buttons for Facebook, Twitter, Google+, Tumblr & StumbleUpon.

Like & Share My Site

This plugin allows you to add social 'like' and 'share' buttons to your site and individual pages.

GP social login vs Like & Share My Site