dpchiesa

gplus is a WordPress Plugin.
It provides a WordPress Widget that displays a list of your recent 
Google+ activities in the sidebar. The plugin uses the Google+ API, and 
authenticates via an API key that YOU (the installer) acquire via the 
Google API Console.
Because it uses the public REST API of Google+ that Google documents and 
supports, this plugin is very reliable and simple. (Other WordPress 
widgets that say they show Google+ activity have relied on 
screen-scraping, which makes them brittle and unreliable.)
<h3>Dependencies</h3>
This plugin depends on and uses the published google-api-php-client, 
available at http://code.google.com/p/google-api-php-client/ .
Rather than requires the installer to download this code, it is packaged 
within the plugin. The Google API php client library is licensed 
independently from the gplus WordPress plugin; The former is licensed 
under the Apache 2.0 license.
<h3>Thanks</h3>
Thanks for your interest!
You can make a donation at http://cheeso.members.winisp.net/GplusWidgetDonate.aspx
Check out all my plugins: 
https://wordpress.org/extend/plugins/search.php?q=dpchiesa
-Dino Chiesa

GPlus

mczolton

The Zolton.org Social Plugin (ZOSP) is a simple plugin for WordPress that 
integrates a blog with popular social networking sites such as Facebook and 
Twitter. I wrote this plugin to learn WordPress plugin development, and as a 
means to decouple these social networking features from my desired WordPress 
theme.
Features
<ul>
<li>Includes the Facebook JavaScript SDK in your WordPress theme.</li>
<li>Generates Facebook Open Graph tags for posts and pages.</li>
<li>Includes the Facebook Like Button and Send Button on posts and pages.</li>
<li>Imports the featured image / post thumbnail (if available) from a post or 
page for use as the featured image on Facebook.</li>
<li>Generates a Facebook Comment section for posts and pages.</li>
<li>Includes the Twitter Tweet Button on posts and pages.</li>
<li>Includes the Google +1 Button on posts and pages.</li>
<li>Includes the Pinterest Pin It Button on posts and pages.</li>
<li>Optionally hides WordPress comments.</li>
<li>Configurable via WordPress setting page.</li>
</ul>
Requirements
<ul>
<li>A Facebook App ID.</li>
<li>A Twitter account.</li>
<li>WordPress theme supporting featured images / post thumbnails.</li>
</ul>
<h3>Known Issues</h3>
<ul>
<li>“Leave a Comment” link is still visible when WordPress comments are disabled.</li>
</ul>

Zolton.org Social Plugin

A simple plugin for WordPress that integrates a blog with popular social networking sites such as Facebook and Twitter.

GPlus vs Zolton.org Social Plugin