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Your Personal Networking Assistant for Twitter, helping you identify relevant followers, recommending you to other users, and regularly computing your twitter usage statistics.
Go now to: Mr. Tweet

Enter a few words or phrases and see how often they appear on Twitter.
Go now to: TweetVolume

Send private Twitter messages to specific groups of friends.
Create a new Twitter account specifically for your group (e.g. initechwebdevs or smithfamily). If you want to make this a private group, make sure that updates are protected in the settings.
Register your group’s new Twitter account at GroupTweet.com
Tell all group members to follow the group account you [...]

Getting to know Twitter - What is it?
Twitter is a service for friends, family, and co–workers to communicate and stay connected through the exchange of quick, frequent messages.  People write short updates, often called “tweets”  of 140 characters or fewer.  These messages are posted to your profile or your blog, sent to your followers, [...]

Twitter Search Engine - searches bio, name, and location
Connect with people who matter
Go now to: Twellow :: Twitter Search Directory, Twitter Search Engine

Graph your Twitter Stats including
Tweets per hour
Tweets per month
Tweet timeline
Reply statistics
In use by over 50,000 Twitter-folk!  The stats are collected using Gnip and represent all updates made on Twitter. Currently, that’s nearly 2 million tweets per day.
Check out Twitter Trending Stats (More to come!)

Today’s Twitter TrendCloud
Top 50 Trends of All Time

Twitter Stats - Which applications [...]

TwitPic lets you share photos on Twitter.
You can post pictures to TwitPic from your phone, on TwitPic’s API, or through the site itself.
There are also popular twitter clients that have built-in support for TwitPic.
Go now to: TwitPic / Share photos on Twitter

In the innovative world of Microblogging, one site aims to organize it all. Tweet Scan searches Twitter, identi.ca and other Laconica-based sites with more being added all the time.
You can search public messages and user profiles with results available via email, RSS, JSON, and Twhirl.
For more information check Tweet Scan’s API page or read the [...]

twhirl is a desktop client for the popular microblogging service Twitter. It allows you to post short 140-character updates about what you are doing, as well as following your twitter friends and read all their updates, replies anyone sends to you, and direct messages to your account. You can also answer to another user by [...]

Get hourly trends on hot terms, people and urls ‘retweet’ed on Twitter via retweetradar
Follow @retweetradar
Go now to: retweet radar  Finding trends in the mountains of information ‘retweet’ed on Twitter