SISCOM WEB DESIGN

This is a simple plugin without any hassles, it automatically adds the Google Plus One Button to your WordPress posts and pages. 
There is no admin for this plugin since everything is done automatically, just upload the plugin , activate it and it will add the necessary code for the Google +1 Button to appear on every post and page. 
The Button will be located at the Top-Right Corner Inline with your posts.
Features:
<ul>
<li>Automatically included on Posts</li>
<li>Automatically included on Pages</li>
<li>Button location is at the Top-Right Corner Inline With the Text</li>
<li>Simple enough, Does not slow down your site, Does not mess up other plugins</li>
</ul>

WP PlusOne This

The WP PlusOne This plugin, automatically adds the Google Plus One ( +1 ) Button to your WordPress posts and pages.

LaClave

The MasDetalles share plugin to help people share, bookmark, and email your posts and pages using Masdetalles share. New: MasDetalles share.
MasDetalles Share le permite compartir sus enlaces en el marcador social Masdetalles.do desde su blog, email, tienda virtual, y cualquier pagina web.

Masdetalles Share

Help people share, bookmark, and email your posts, pages, your favorite links through MasDetalles.do

WP PlusOne This vs Masdetalles Share