The Triberr plugin sends your WordPress posts to your Triberr stream automatically to encourage sharing by tribemates. Get your articles into the Trib
Twitter button plus is nice and useful tool to show Twitter tweet button on your website.
Send WordPress Pages, Posts or Custom Post Types to your Buffer (bufferapp.com) account for scheduled publishing to social networks.
Display Twitter Tweets Using Widget On WordPress Blog With Follow Button
Publish posts automatically to social media networks like Facebook, Twitter and LinkedIn.
Publish posts automatically to Twitter.
Publishes your WordPress posts to Twitter, Facebook and MySpace.