Twitual

Twitual is a great Twitter follow management tool that creates lists of who you follow, who follows you, who isn't reciprocating, etc.

TwitKit

TwitKit is a FireFox addon for Twitter.

TweetReach

TweetReach is a great tool for Twitter that tells you how far your tweets travel.

Twitter Background Base

Twitter Background Base has some of the most incredibly beautiful free Twitter backgrounds available.

CoTweet

CoTweet is an excellent tool for managing Twitter, perfect for businesses.

Digsby

Digsby is an incredible tool to organize your social media efforts, instant messanging, e-mail, etc.

Crowdeye Revisited

I have to say, Crowdeye has impressed me completely. They have created one of the best Twitter tools available.
















I was already impressed with the people-finding features, but you may manage everything for Twitter from their website.

You can search a topic that interests you , and quickly see trends, recent tweets, most popular links, hot searches, top 20 sites, related queries. You even get a view for daily stats on tweets for your term, and may easily drill into the tweets for that day.

If you log in with your Twitter info, you may follow a user from the recent tweets, repost their tweets, etc.

This is an incredible tool for managing many aspects of Twitter.

Very nice!!