eppand

This plugin will add a configurable widget to display social media icons in your widget area(s). Icons are 32×32, squared edges, and display inline.
Supported social media links include:
<ul>
<li>Twitter</li>
<li>Facebook</li>
<li>Google+</li>
<li>LinkedIn</li>
<li>YouTube</li>
<li>Pinterest</li>
<li>RSS</li>
</ul>
Available Languages
<ul>
<li>English (en_US)</li>
<li>Serbo-Croatian (sr_RS) – Borisa Djuraskovic at (http://www.webhostinghub.com/)</li>
</ul>
UPGRADE NOTICE
A change has been made to the social profile links if you are upgrading this plugin from a version prior to 1.0. The Social Media URLs are managed from a new area in the WordPress admin and will require you to enter your URLs again.

SimpleConnectWidget

This plugin will add a configurable widget to display social media icons in your widget area(s). Icons are 32x32, squared edges, and display inline.

denishua

使用新浪微博瓣账号登陆你的 WordPress 博客，并且留言使用新浪微博的头像。博主可以同步日志到新浪微博，用户可以同步留言到新浪微博。
详细介绍： http://fairyfish.net/project/sina-connect/

新浪连接

使用新浪微博瓣账号登陆你的 WordPress 博客，博主可以同步日志到新浪微博，用户可以同步留言到新浪微博。

SimpleConnectWidget vs 新浪连接