Peadig

Adds an unofficial Google+ Share button to any WordPress page, post or template.
<ul>
<li><a href="http://pleer.co.uk/wordpress/plugins/google-plus-share-button/" rel="nofollow ugc">Google Plus Share Button</a> Plugin homepage.</li>
<li>More <a href="http://pleer.co.uk/wordpress/plugins/" rel="nofollow ugc">WordPress Plugins</a>.</li>
</ul>

Google+ Share Button

Adds an unofficial Google+ Share button to any WordPress page, post or template.

ddd2500

Promotion your pr in google +1 with the google plus one bottom plugin. With google plus one bottom, your users can promote your content by sharing google +1.
This plugin now is only provide google +1 in single post page, the more will be later. With the google’s css, has some interface problems in the plugin admin interface, but it only in the admin interface.
RoadMap:
1:provide a shortcode to wordpress. 
2:fix the css(now is use the google’s). 
3:More custom in the front, weight, achive, and so on.

Google Plus One Bottom

Promotion your pr in google +1 with the google plus one bottom plugin. With google plus one bottom, your users can promote your content by sharing goo …

Google+ Share Button vs Google Plus One Bottom