mabujo

googleCards is a google+ wordpress plugin. 
It adds a widget to your blog that will display a link to your google+ profile so people can add you to a circle (follow you). It also displays your name, profile picture and the number of people who have you in circles.
The plugin uses caching to store your google plus profile data to eliminate checking google+ on every page load. 
For the caching to work, your web-server needs to be able to write to wp-content. (a lot of plugins require this so it should be fine). 
If the plugin cannot cache it will still work, but will store the data in the database instead. If caching is working you should see a file called plus_card.txt in /wp-content/cache/. 
As of version 0.4, caching will also failback to using transients to store your scraped google plus data.
Plugin page : <a href="http://plusdevs.com/google-wordpress-plugin/" rel="nofollow ugc">Google plus wordpress plugin @ plusdevs</a>

googleCards

A simple plugin that adds a google+ widget for linking to your google+ profile and showing your number of followers

Rodrigo Donini

This plugin was created to deliver a simple way to list links of profiles social networks.
It can be used in sidebar, footer and any other type of WordPress sidebar.
With this widget you can:
<ul>
<li>Add a profile of a social network.</li>
<li>Define the size of widget.</li>
<li>Define if only icons showed or if icon and name is showed.</li>
<li>Define presentation of widget, select a color you want.</li>
<li>Define target of links.</li>
<li>Define orientation of the presentation of widget.</li>
</ul>

Don Social Widget

This plugin solve many situations when we need put our social link in our WordPress sites.

Simple and cool

Just another social widget plugin, put it in your sidebars and footer. Simple and flat.

googleCards vs Don Social Widget