Alex Sawallich

This plugins enables the famous Google +1-button in your wordpress-installation. The button is shown beneath 
your posts/pages. With this button you can share the permalink to your post/page in your Google+ profile.
You’ve got the possibility to change the look of the button in the same manner, that you can do by using the 
configurator that Google provides: see <a href="http://www.google.com/webmasters/+1/button/" rel="nofollow ugc">Google plus one</a>.

Google+ One Button

Provides a +1 button from Google+ beneath each post/page.

Skysa

Let a visitor share your pages and content with friends on Google Plus with this Google Plus One button which floats at the bottom of your pages on the Skysa App Bar. Google Plus is a social network which connects all people who have a Google account. When a user clicks a Google Plus One button on your site, they will not only share the page with their friends on Google Plus, but it will also affect Google search results for the shared page.
http://www.youtube.com/watch?v=Zj1uGXX2xrk&hd=1 
<a href="https://wordpress.org/extend/plugins/tags/skysa-apps" rel="ugc">More Skysa App plugins</a> -|||- <a href="https://wordpress.org/extend/plugins/skysa-official/" rel="ugc">Skysa App Bar Integration plugin</a>

Skysa Google +1 App

A Google +1 button which you can configure to share any page on your site.

Google+ One Button vs Skysa Google +1 App