This plugin provides PR companies and users wanting to pitch, a means to give an “elevator” pitch in 140 characters or less.
Twitter Blaster is a plugin that will allow your visitors to post to your Twitter account.
A simple plug-in that allows readers to share the title and permalink for a post through a number of online services.
Twitterfountain mashes up tweets and Flickr-images that share the same tags into a spectacular visual.
twitterDash adds twitter to your WordPress-dashboard.
Plurkolate is a plugin to put your Plurks on your wordpress blog.