Enter a Twitter ID and this tool will display from where the people that particular person is following are in a global map.

This tool will show you the latest tweets from your friends on a map.

View and reply to Twitter conversations as threaded discussions. Bringing order to Twitter.

Just like Alexa, this site will allow to see how many time a particular term has been used on Twitter, Digg, MySpace, YouTube, and Flickr. You can add in multiple terms and see bar graphs comparing the terms.

Tracking the links you share on Twitter and Friendfeed

Twemes follows Twitter public messages with particular tags to build a meme around a topic.

You can grab your Twitter stats including your tweet timeline, tweet per month, and tweet per hour.

With this, you can check how many time a particular word appear on Twitter. You can compare upto five words and see the results in bar graphs.

This tool allows you to generate an RSS Feed of a filtered list of tweets from a certain area.

TweetMeme finds the hottest stories from twitter for you to retweet