I. The TweetMeme retweet button
is for website and blog publishers who want to encourage their audience to tweet their content on Twitter.
The button shows a live count of the number of times your webpage or blog post has been tweeted.
II. Drag to Share.
We’ve all seen the brilliant functionality on Mashable where news stories and interesting articles can be shared to social networking sites, the functionality is driven by the images accompanying the articles; you click and hold on an image and can then drag it into a toolbar to share it. It’s brilliant and intuitive know how demo here.
III. Social Networks Connection functionalities
Twitter has quietly released Sign in with Twitter which is a neat system allowing websites to access your Twitter account details without you having to give them your password.

To implement Twit Connect plugin from Voice of Tech on Blogs so that all readers can leave a comment without entering their URL & name. All you have to do is click the button and your name, avatar & Twitter profile page will go alongside your comment.
There is also Facebook sign in functionality for wordpress which you can acces here



