• 21Tweets - Create a new habit and change your life. 21 tweets in 21 days and you are used to another habit. Works a little like a personal coach for you to support you in your change. With calendar statistics

• BigTweet  ♥ Surf the web and post to Twitter! BigTweet lets you tweet from any web page using a bookmarklet that installs on all major browsers. A stand-out feature of BigTweet is that you stay on the current page - no pop-up windows needed for tweeting ● Automatically capture web page title, highlighted text and link (which is shortened for you with Bit.ly) ● OAuth support for secure login ● Integrated with Delicious, Ping.fm and Bit.ly (track your link statistics) ● Easily switch between multiple Twitter accounts ● Include all kinds of special character symbols in your tweets. BigTweet Button and WordPress Plugin also available to drive traffic to your site. Simply the fastest and easiest way to share links!

• futz.me - Send Tweets from your Address bar without logging in to anything. Like this: "futz.me/xxx/t Going to California" where "xxx" is your futz.me username. In Beta. 

• Tweepular - The Ultimate Follower Management Tool. Find out whos following you and whos not and quickly cleanse your Twitter account of users that have not updated or are not valuable to you.

• TweetMyLink.com - Post your link for the whole Twitter world to see. Vote or ReTweet your link to the front page for maximum exposure. No registration required.

• Tweetans -Ask a question (any question!), and receive answers from experts all over the world!

• TwAitter - Twitter for busy people. TwAitter is a comprehensive FREE tweet scheduler. Schedule tweets to send at anytime (recurring included).  Manage your scheduled messages with an Outlook style Twitter Calendar. Features: Full Client, multi-account management, schedule, recurring, calendar, translation into over 40 languages, spell check , URL shortener...and more! (www.twAitter.com)

• TwitWall.com - The Instant Blogging Companion for Twitter. Blog with video, audio, widgets, and long text; automatically posts Twitter status updates.

• DreamTweet - Anonymously post your dream or nightmare for the world to see! A live Twitter integrated dream log.

• HootSuite.com - Manage multiple Twitter profiles, add multiple editors, pre-schedule tweets, and measure your success with "click-through" stats.

• MoochFly - Keep track of things you lend to your friends. Sends direct twitter message reminders to help people remember to return the things they have borrowed.

• Philtro - Rate articles and tweets so you can find the most interesting, relevant posts first. It's like a spam filter for your RSS & Twitter subscriptions.

• PRM.PeopleBrowsr - Follow the right people, get them to follow you back, engage with targeted messages and make the most out of Twitter. Extend and manage your networkand filter to find people matching specific criteria (eg: People in New york, talking about "art"). PRM scans the web in real time to bring you memes and themes and the pulse of now across all your social networks. Engage with users mentioning your @Name, brand or any specific keyword right now. Autofollow targeted profiles, manage multiple accounts (up to 10 per user) andschedule your Twitter posts to reach people in different time zones. Prm.PeopleBrowsr allows you to automate direct messages to your followersand to autounfollow. PRM is web based, no download needed.

• Readmytweets.com - Read other people's tweets and others will read yours.

• TweetLater.com - Schedule tweets, auto-follow and auto-welcome messages, and email keyword alerts.

• TweetOClock.com - Find out the best day and time to send anyone on Twitter an @reply or direct message.

• TwiST -- Twitter Search Tool, time saving tool for searching Twitter

• Twit2Do - Use twitter to manage a to-do list. Update via Twit2do.com or by sending an @twit2do reply on twitter.

• Twitter Pigeon - Twitter Pigeon is a new way to ask questions using Twitter. Keep all of the answers to your questions on one page with a unique URL that you can share.

• TwitterJobcast - Browse by city to see who is hiring on Twitter or search using your city and state or zip code. Includes cities in the U.S., Canada, Australia, and the U.K.

• Twitrans.com - Translate Your Tweets to Any Language by Human Translators. @twitrans help for more info

• Tweetreplies.com - Have your @replies send directly to your email in real time, the emails are sent out every 10 minutes.

• Twtpoll - A simple survey/poll twitter app. Create polls. Share it with your tweeple via a short url. No username/passord required. (By @twtapps)

• Tweetvisor.com - Twitter interface with automatic refresh for real-time updates about favorite topics, news and tweets. Currently supporting groups and friend tags that filter friends timeline, replies and DM sidebars, hot topic box to monitor favorite topics, inline video replies, manage multiple accounts.

• TwitExplorer.com - A full featured Twitter web client which allows you to better manage your followers and find new interesting people to follow.

• Twttrstrm.com - Ask a question, and have other tweeters contribute answers to your Squidoo lens.

• Twtask.com - create very simple task lists by @reply or DM @twtask

• TweetActive.com - Get real time twitter stream, follow trending topics.

• TrackDailyGoals.com - Keep track of your personal productivity by using the #dailygoals hashtag combined with this site.

• Tweetizen - Discover tweets that matter to you. Create groups based on your interests and filter tweets that you want to read. You no longer will have to scan through thousands of tweets to find something useful. You can find groups on technology, jobs, gossip, news - think Digg.com, but for tweets.

• Twups - Twitter news aggregator, allows you to follow all your favorite subjects in one place. You can even suggest topics!dat

• TwitterContd - Allows you to type more than 140 characters and display the entire status on your twitter page. No external links or anything. Also has a feature that allows you to create Shortcuts (for commonly used pharses) so you dont need to type them again and again and also save time...Follow me @contd

• Loop12.com lets you encrypt and store any short text and retrieve it later with a few keystrokes.  You can send short notes to Twitter and import them directly into your Loop12 account.

• TweeTrans lets you translate your tweets automatically into over 40 languages and has a Twitter bot that allows you to get a translation by tweeting the text to translate. It works with virtually any Twitter client.

  -------

From the main page. May need to be sorted/added to above & checked ofr dupes.

• DreamTweet - Anonymously post your dream or nightmare for the world to see! A live Twitter integrated dream log.

• HootSuite.com - Manage multiple Twitter profiles, add multiple editors, pre-schedule tweets, and measure your success with "click-through" stats.

• TwAitter - Twitter for busy people. TwAitter is a comprehensive FREE tweet scheduler. Schedule tweets to send at anytime (recurring included).  Manage your scheduled messages with an Outlook style Twitter Calendar. Features: Full Client, multi-account management, schedule, recurring, calendar, translation into over 40 languages, spell check , URL shortener...and more! (www.twAitter.com)

• Loop12.com lets you encrypt and store any short text and retrieve it later with a few keystrokes.  You can send short notes to Twitter and import them directly into your Loop12 account.

• MoochFly - Keep track of things you lend to your friends. Sends direct twitter message reminders to help people remember to return the things they have borrowed.

• Rightbrain Search - Rightbrain presentation of photo, video, and Twitter comments on any query. Not a search engine.

• Philtro - Rate articles and tweets so you can find the most interesting, relevant posts first. It's like a spam filter for your RSS & Twitter subscriptions.

• Readmytweets.com - Read other people's tweets and others will read yours.

• Tweepular - The Ultimate Follower Management Tool. Find out whos following you and whos not and quickly cleanse your Twitter account of users that have not updated or are not valuable to you.

• TweetLater.com - Schedule tweets, auto-follow and auto-welcome messages, and email keyword alerts.

• TweetMyLink.com - Post your link for the whole Twitter world to see. Vote or ReTweet your link to the front page for maximum exposure. No registration required.

• TweetOClock.com - Find out the best day and time to send anyone on Twitter an @reply or direct message.

• TwiST -- Twitter Search Tool, time saving tool for searching Twitter

• Twit2Do - Use twitter to manage a to-do list. Update via Twit2do.com or by sending an @twit2do reply on twitter.

• Twitter Pigeon - Twitter Pigeon is a new way to ask questions using Twitter. Keep all of the answers to your questions on one page with a unique URL that you can share.

• TwitterJobcast - Browse by city to see who is hiring on Twitter or search using your city and state or zip code. Includes cities in the U.S., Canada, Australia, and the U.K.

• Twitrans.com - Translate Your Tweets to Any Language by Human Translators. @twitrans help for more info

• Tweetreplies.com - Have your @replies send directly to your email in real time, the emails are sent out every 10 minutes.

• Tweetasaur.us - A Twitter client for 140+ character messages. Optimized for Safari on iPhone. Rawr!

• Twtpoll - A simple survey/poll twitter app. Create polls. Share it with your tweeple via a short url. No username/passord required. (By @twtapps)

• Tweetvisor.com - web-based Twitter interface, that enables people to better manage multiple Twitter accounts, returns real-time updates about favorite topics, news and tweets, and supports groups, tagging friends, inline video replies, multiple URL shortener services, various templates, integrated feed reader.

• TwitExplorer.com - A full featured Twitter web client which allows you to better manage your followers and find new interesting people to follow.

• TwitWall.com - The Instant Blogging Companion for Twitter. Blog with video, audio, widgets, and long text; automatically posts Twitter status updates.

• Twttrstrm.com - Ask a question, and have other tweeters contribute answers to your Squidoo lens.

• Twtask.com - create very simple task lists by @reply or DM @twtask

• TweetActive.com - Get real time twitter stream, follow trending topics.

• TrackDailyGoals.com - Keep track of your personal productivity by using the #dailygoals hashtag combined with this site.

• Tweetizen - Discover tweets that matter to you. Create groups based on your interests and filter tweets that you want to read. You no longer will have to scan through thousands of tweets to find something useful. You can find groups on technology, jobs, gossip, news - think Digg.com, but for tweets.

• Twups - Twitter news aggregator, allows you to follow all your favorite subjects in one place. You can even suggest topics!dat

• TwitterContd -  Allows you to type more than 140 characters and display the entire status on your twitter page. No external links or anything. Also has a feature that allows you to create Shortcuts (for commonly used pharses) so you dont need to type them again and again and also save time...Follow me @contd

• Tweetans -Ask a question (any question!), and receive answers from experts all over the world!

• TwitterAnalyzer - is one of the most extensive Twitter applications ever... basically, its a tool for Twitter users to analyze themselves or their friends, but Twitter Analyzer takes the statistics data to a much higher level... (it is called by some Twitter users the "Google Analytics for Twitter users") and rightly so, TwitterAnalyzer features more then 50 statistics measures displayed in 3D graphs and World Maps enabling surgical precision tuning of your twitter stream... you would discover many things about your or your friends Twitter presence... you can even share your statistics with your friends.
• twitRobot.com - Increase your product sales using recurring tweets about your product and links.
• TwittBee is a simple and pretty Twitterwall for Activity around your Twitter Hashtag. Use it, share it!
• TXTbin - Tweet more than 140 characters. Txtbin allows you to save unlimited length text and post it to twitter easily. Very useful if you don't wan't to break longer text into multiple tweets.
• 21Tweets - Create a new habit and change your life. 21 tweets in 21 days and you are used to another habit. Works a little like a personal coach for you to support you in your change. With calendar statistics
• TwitWall.com - The Instant Blogging Companion for Twitter. Blog with video, audio, widgets, and long text; automatically posts Twitter status updates. Update: TwitWall is now OAuth enabled.
• TwAitter - Twitter for busy people. TwAitter is a comprehensive FREE tweet scheduler. Schedule tweets to send at anytime (recurring included).  Manage your scheduled messages with an Outlook style Twitter Calendar. Features: Full Client, multi-account management, schedule, recurring, calendar, translation into over 40 languages, spell check , URL shortener...and more! (www.twAitter.com)
• Calendar Tweet - Tag, Share, and Promote events to be added to followers Calendars. Also create directly from any Twitter.com interface. Use as private/reminder Calendar or as a promotional tool on Twitter.
• Twitnote - A new kind of twitter service that allows you to jot down your notes wherever you are. It allows you to send a quick @mention or direct message to twnote, which will then be stored as a note at Twitnote. Seamlessly fitting in with your twitter experience, Twitnote adopts your colour scheme and background image from your twitter account. With support for search, export, hashtags & even a public notes page (complete with RSS), Twitnote is a feature rich and easy-to-use solution. If you can tweet, you can send yourself a quick note.