Google Chrome Extensions

TweetPage – Twitter this Page

TweetPage allows you to Tweet about the page you’re currently viewing. Will automatically shorten URL using j.mp and include page title in tweets.
Much like the many available bookmarklets, except this one allows you to tweet directly from within the extension, without leaving the site you’re on to go to twitter.com. You’ll need to log into Twitter the first time you use it, but after that, simply click the button, alter the tweet as you desire, and submit.