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.

kundi

Social Kundi is the most powerful, simple and elegant wordpress social sharing solution. It adds Facebook Open Graph meta tags to your blog and allows you to call simple function from you template files, which places sharing functions on your blog (Facebook, Twitter and Google + 1).
Unlike the other WordPress social-sharing plugins it requires minimal options to be set in order to work. It does not support social sites, which won’t have any effect on your site.
If you want to have a long list of time-consuming, unnecessary set of options with loads of other features to be set, such as setting social sharing sites, icon sizes, colors, positions and so on, then this plugin is not suitable for you. Social Kundi is intended for effective social sharing and it was carefully designed to be plain and simple.

Social Kundi

Elegant and simple social sharing solution for your blog. Supports Facebook, Twitter and Google+.

GP social login vs Social Kundi