TBuzz is an interesting new tool that fosters Twitter buzz around web pages. The concept is incredibly simple: drag a button into your browser bookmarks and hit it whenever you visit a web page you’d like to talk about on Twitter.
Twitter Charts graphs any users Tweets based on a timeline that includes day of the week and by hour.
Trendrr allows you to easily track the popularity and awareness of trends online.
Discovering trends, popular topics and popular people by tracking Retweets across Twitter
Twitt(url)y, or twitturly if you prefer, is a service for tracking what URLs people are talking about as they talk about them on Twitter.
We Follow is a new user powered Twitter directory.
Twitter Yellow Pages
Tweetmeme is a mashup app that tracks what's cool and being talked about among the Twitter crowd. Whatever's being talk about most, gets a higher ranking. Tweetmeme tracks new and old content to see just what's hot in the Twiiter sphere. With Tweetmeme, you can literally track when and how a website goes viral. All new content is cast into the virtual 'river' and set float for others to jump on. Content is also categorized into blogs, audio, video and images. There's RSS feeds for the river as well. See what everyone's twittering about; don't get left out.