Twitter Tools you can't live without

Change Twitter Background
Go here to change your Twitter background image or theme for free: Twitbacks.com or Mytweetspace.com

Twitter Autoresponder
Tweetlater is a Twitter tool that allows you to auto-respond to those that follow you and set up automatic messages.

Expand your Twitter Followers
Twit Pro Quo is a new and exciting way to expand your reach on Twitter.
Other services TweeterGetter, Tweet Penguin, ViralFollowers, Twitteronlinesystem.com

Earn Money While You Tweet
You enjoy tweeting with your friends, but wouldn't it be great to make a little extra cash on the side while you post on Twitter? twtAd has the solution: they give you links to post on your Twitter account, and you earn money each time someone clicks on your link!

Auto Follow People on Twitter
Easy tool that discovers people with the same interest as you. It will automatically follow people based on keywords (5 keywords are free). Also to be used to automatically track what people are saying about your website or products. And last but not least it is a great way to build up followers. Check it out: http://twollow.com/

Desktop Tools to manage your Twitter account

Twhirl is a desktop client for the Twitter microblogging service. Most of the features available on the Twitter website are accessible through twhirl, too. Plus, a lot of usability enhancements have been added.

TweetDeck is your personal browser for staying in touch with what's happening now, connecting you with your contacts across Twitter, Facebook and more. TweetDeck shows you everything you want to see at once, so you can stay organised and up to date.

Twitscoop was built to help you stay on top of twitter's hot topics or discussions.
Through an automated algorithm, twitscoop crawls hundreds of tweets every minute and extracts the words which are mentionned more often than usual. The result is displayed in a Tag Cloud, using the following rule: the hotter, the bigger (no joke here). http://www.twitscoop.com/

Twitter Tools you can't live without: Twitter Tools