http://pelanne.com/twitter/
A google maps mashup with local twitter data pulled from TwitterLocal
http://www.tweetwheel.com/
“Find out which of your Twitter friends know each other!”
http://twittersnooze.com/
‘Hit the snooze button on your “verbose” Twitter friends.’
http://tweetpotato.com/
“What’s a Tweet Potato? Well… it’s a game of chukin a virtual hot po-tater around with your friends…
http://crowdstatus.com/
“Crowdstatus is made up of crowds, each crowd contains people and each person in the crowd has a status.…
http://www.tweetpeek.com/
Create group Twitter feeds
http://twitterteams.com/
“Most of us have become familiar with the whole hash tagging of messages in twitter. Twitter Teams…
http://www.grouptweet.com/
“Send private Twitter messages to specific groups of friends!”
http://www.twitterlocal.net/
Generate RSS feed for Tweets coming from your part of the world. Enter a city, state or postal code…
http://www.twitterverse.com
Monitors popularity of words used in Tweets, displayed in a cloud format and covering the last 10 hours…
http://web.forret.com/tools/twitter-tq.asp
http://bradkellett.com/twitter_stats.html
“generate graphs showing your Twitter usage patterns.”
http://www.tweetvolume.com
http://tweetstats.com/
“Generates graphs on how you are spending your time in Twitter.”
http://www.twitstat.com/
“real time Twitter analytics”. Lots of searchable stats, follow @twitstat to be included.
http://www.twitterholic.com/
http://www.sleepydisco.co.uk/plugins/simpletwitter/
“Wordpress plugin that displays your latest Tweet on your blog.”
http://www.twittercard.com/
“create a mini Twitter badge displaying your latest status update for your blog.”
http://twemes.com/
“Twemes.com follows public Twitter.com tweets (messages) that have embedded tags that start with…
http://hashtags.org/
“Hashtags is an opt-in service. You must follow @hashtags for the service to index your tweets.”