wackey

This plug-in is Twitter “@Anywhere” API and “Topsy” API using. 
Visitor’s twitter account can be attested putting up connected button to the blog entry. 
After it attests it, link and blog owner’s following buttons and blog owner’s twitter profile can be displayed. 
Furthermore, the visitor takes side with the page by visitor’s account and it is possible to contribute. It is default and there are url on the page and blog owner’s twitter account. As a result, my account and blog URL will flow out on twitter, and the conversation extends.
<h3>Requirements</h3>
<ul>
<li>WordPress 2.9 or later</li>
<li>PHP 5.0 or later</li>
</ul>

Tw Anyware comment system

Add Twitter anyware API,connect and tweet,follow.And Topsy API using.It displays it like the comment column.

qiqiboy

支持微博账号与网站已有账号的绑定。
提供wordpress与其它社交媒体网站的连接登陆及文章同步、评论同步转发功能。
支持Github、Google、Yahoo、Facebook、Twitter、人人网、新浪微博、腾讯微博、搜狐微博、网易微博、天涯微博、豆瓣、饭否等约20个第三方网站的账号连接登陆、文章同步、评论
效果预览：<a href="http://www.qiqiboy.com/products/plugins/social-medias-connect#respond" rel="nofollow ugc">http://www.qiqiboy.com/products/plugins/social-medias-connect#respond</a>
欢迎在新浪微博收听我：<a href="http://weibo.com/qiqiboy" rel="nofollow ugc">@qiqiboy</a>
V2.0功能 
完全重写了以前的代码，插件更稳定！

Social Medias Connect

提供wordpress与其它社交媒体(Social Media)网站的账号绑定、连接登陆及文章同步、评论同步转发功能。

Tw Anyware comment system vs Social Medias Connect