
The Twitter Toolbar provides an easy to use short cut/quick links toolbar that aims to bring Twitter so close that it is only one click away. You’ll have access to a large variety of highly requested tools & resources (including Twitdom).
With the Twitter Toolbar you can:

Instant Tweets is a Firefox plugin that allows you to use the Firefox 'awesome bar' to send out Twitter Status...
Hummingbird is a marketing software for Twitter. It focus on managing your followers and friends. Follow pages at a time...