~140 Characters

• 140it - Makes Your Tweet Less Than 140 Characters
• Tweetcontd - More than 140 characters
• Twonvert - Convert your tweets to 140 characters or less
• Twitlonger - When 140 characters just isn’t enough
• Tweetshrink - Helping shave those few extra letters off a tweet that has exceeded the 140 character maximum
• TwitBlogs - Allows you to add more words and also upload pictures and videos
• Twerbose - Post longer tweets on Twitter
• Tweet140 - The closer to a 140 character average, the better your score
• RTweeter - TweetLonger than 140 characters, shorten URLs, share your location

Ads

• Twittertise - Advertise on Twitter
• Twitterad - Monetize your twitter profile
• TwitterCard - Place a 125×125 TwitterCard on your Blog or as an Advertisement
• Twitterribbons - Twitter Ribbon Ad generator
• TwitterKnowHow - Twitter ribbon ad generator
• BeaMagpie - Be a Magpie is an ad network for Twitter
• TweetTornado - Fully automated advertising software
• FeaturedUsers - FeaturedUsers is a Twitter application ad network

Backgrounds and Buttons

• Twitbacks - Create free Twitter backgrounds
• Twitrounds - Twitter Backgrounds
• TwitterBackgrounds - Twitter Backgrounds
• TwitterBackground - Twitter Backgrounds
• Twtbg - Twitter background checker
• Twitter-images – Twitter Backgrounds
• TwitterGallery - Free Twitter themes
• PrettyTweet - Free Twitter backgrounds
• DoctorTwitter - Twitter Backgrounds and Twitter layouts
• Go2Web20 - Twitter follow badge for your site
• TwitterButtons - Free Twitter buttons
• LogoTwitter - Create a logo similar to the Twitter
• MyTweetSpace - Brand your Twitter profile
• Peekr - Click to view Twitter backgrounds
• TwitterBackgroundsGallery - Twitter backgrounds gallery
• Twitter My Site – Get custom buttons for Twitter
• Twitter Patterns – Background patterns for Twitter
• TwitButtons - Twitter buttons
• TwitLogo - Generate your own Twitter logo
• TwitterImage - Custom Twitter backgrounds
• WishaFriend - Twitter backgrounds
• SweetTweet - Twitter backgrounds, buttons and layouts

Backup

• Tweetake - Back Up your Twitterings
• TweetBackup - Backup for your Twitter

Browser Plugins

• TwitterFox - TwitterFox is a Firefox extension that notifies you of your friends’ status on Twitter
• TwitterBar - Post to Twitter from your address bar
• Power Twitter – Makes Twitter better
• TwitterLine - Twitter headline extension for Firefox
• Twitter Search – Twitter search
• Tweetfox - helps you to post excerpts from the websites you visit with a click of the button and attach a short URL to the source page.
• StockTwits - Links stocktwits tagged ticker on Twitter back to StockTwits
• Twitzer - Lets you post text longer than 140 characters on Twitter
• TwitterJobSearch - The world’s first job search engine to harness the power of Twitter
• TweetIE - Twitter IE plugin
• AddATweet - AddATweet’s mission is to make every page on the Internet commentable.
• Instant Tweets – Instantly send pages, pictures and tweets to Twitter from any where on the web
• Tweecious - Listening to your twitter feed and submitting all the links to your delicious account
• TwitKit - TwitKit is a Twitter sidebar
• TwittIE - Make your Internet Explorer tweet
• Twitbin - Allows you to keep up with all of your Twitter conversations right from your browser sidebar
• DashBlog - Lets you collect videos, images, text, songs and screenshots from any web page and publish them to your blog or twitter
• Social Whale Extension – Create short URLs for use on Twitter
• shortText - Twitzer is a Firefox extension which lets you post text longer than 140 characters
• TwitThat - Post current page to Twitter via twitthat.com
• Song.ly – Lets you share music links on Twitter
• TwittyTunes - Allows to post your currently playing songs to Twitter
• Tweetstalk - The simple way to stalk Twitter users without having to follow them
• Yoono - Yoono simplifies your social life by centralising all your social networks and instant messaging in one easy to use browser sidebar
• Twippera - Twitter widget for Opera

Business

• CoTweet - Designed for businesses using Twitter to engage existing customers and attract new ones
• TwtBizCard - Twitter business card
• ComTweets - Twitter + business
• twtQpon - Create Twitter coupons for your business
• Twtvite - A simple event manager twitter app
• Twitzu - Promote your events on Twitter
• TwitRobot - Twitter marketing tool
• TweetManager - Twitter app for complete Twitter automation

Causes and Charity

• Adcause - Saving the world one tweet at a time
• EarthTweet - What are you doing to help the planet
• TipJoy - Simple social payments for great people, causes & content
• Twibbon - twibbon.com is the easiest way to promote awareness of your cause on twitter
• TwitCause - Support causes you care about
• Twonate - Giving is good
• TweetsForACause - One tweet one voice

Celebrity

• Celebrifeed - Celebrifeed allows you to follow and interact with your favorite celebrities on Twitter
• CelebrityTweet - Stalk celebrities on Twitter
• CelebritiesThatTwitter - Celebrities that twitter
• Celebritwee - Fresh Tweets about Hollywood A-Listers
• FollowCost - Is that Twitter celebrity worth the pain
• TwitterTracker - Keeping you in the know with all the celebrity sweet tweets

Clouds

• Tweetcloud - What’s being said
• Tweet Cloud – View Twitter timeline as a tag cloud
• Twittospheric - See tweets as if you were in the Twittosphere
• Cloud.li – Twitter clouds
• Search Cloudlet for Twitter – Inserts smart tag clouds into Twitter interface to help you search faster
• Tweetclouds - Make a word cloud
• Twittersheep - See a tag cloud from the ‘bios’ of your twitter flock

Dating and Love

• Flirt140 - Flirt140 is a site that helps Twitter-ers find each other for dates and more
• MyTweetHeart - Twitter singles looking for friendship, romance, and love
• Radaroo - The simple and free Twitter dating system
• Twitcrush - Which three tweeple do you <3 the most
• Textgasm - Twitter secrets
• PornstarTweet - Stay up to date with your favourite pornstars
• TwitYa - Twilationships

Desktop & Web Clients

• Tweetdeck - TweetDeck connects you with your contacts across Twitter, Facebook and more
• Seesmic Desktop – Desktop client connecting you to Twitter and Facebook
• Destroy Twitter – DestroyTwitter is a compact though robust Twitter application built to run on Mac, Windows, and Linux
• Twhirl - Twhirl is a social software desktop client
• Chirpr - Windows sidebar gadget for Twitter
• Accessible Twitter – Web accessibility for the Twitter web application
• Pwytter - Multi-platform Twitter client written in Python
• Mixero - The new generation Twitter client for people who value their time and are tired of information noise
• Snitter - A Twitter client for Mac and Windows
• TweetMyPC - TweetMyPC lets you shutdown/restart/LogOff your windows PC remotely
• Posty - Posty simplifies your microblogging
• Sideline - Watch, search and monitor the Twitter public timeline in real-time
• Twitexplorer - The most efficient Twitter client on the Web
• T-messenger – A simple to use, powerful, intelligent Twitter client for every-day users
• Nambu - Social messaging streamlined
• Tweetie for Mac – Twitter client for Mac
• Teletwitter - Twitter client for Windows
• Digsby - Digsby is a social networking tool that alerts you of events like new messages
• Twitteroo - Send Twitter tweets fromyour PC
• Twinja - A desktop client Twitter built on AIR
• Tweeter - A java desktop client for Twitter
• Feedalizer - Twitter, Facebook adobe air app
• Gwibber - Gwibber is an open source microblogging client for GNOME
• TwInbox - Use Twitter directly from Outlook
• MadTwitter - Twitter for Windows
• Spaz - An open-source Twitter client for Mac OS X, Windows and Linux
• Twitteron - A robust, easy to use, free twitter client for all operating systems
• Tweetr - Twitter client for Mac / PC
• Twittm - Twitter for desktop
• Jata - Just another Twitter app
• Spreadtweet - IT’s Twitter disguised as a spreadsheet
• Blu - The Vista Twitter client
• bDule - Twitter client for Windows
• Statuzer - Twitter client running through Air
• Buzzom - Twitter Account Management Tool

Dictionary

• Twittonary - a Twitter dictionary
• Twitter Customer Service – The ultimate list of stores on Twitter
• Twittords - Find Twitter words here
• HashDictionary - A dictionary for Twitter
• SocialBrandIndex - Define your brand and connect with your community
• GovTwit - The government Twitter directory

Directory

• Twellow - The Twitter yellow pages
• JustTweetIt - The tweeter directory
• Loaded Web - Local Twitter directory
• TweetFind - Live Twitter directory
• Wefollow - A user powered Twitter directory
• iList - Classifieds
• BlackTwitters - Find African American Twitterers
• Tweetburn - Tweetburn is a directory of the top twitter users on popular topics
• TweetSocial - TweetSocial Twitter Directory
• Floxee - The most powerful Twitter directory platform on the web

Drawing and Painting

• TwitDraw - Draw graffiti on Twitter
• TwitPaint - Paint graffiti on Twitter

Email

• Tweetbeep - Twitter alerts by email
• Topify - replaces the email notification you receive from a new Twitter follower, with a visually enhanced email
• TwitterMail - Post to Twitter by sending an email to a specific TwitterMail address
• Twilert - Twitter search alerts via email
• Tweetshots - Enables you to take tweets to tumblr, embed in blogs or send to email
• NutshellMail - Send tweets, DM, reply, retweet and follow all through email
• Sigpad - Email signatures for Twitter
• Twimailer - Twimailer is a free service that delivers that information right to your inbox
• Follows - Get changes to your followers list emailed to you
• Twitter2Mail - @replies to your inbox
• Replies - Get tweets containing @your_username in your inbox without revealing your Twitter password
• Twply - Have your @replies forwarded to an inbox
• Ravishare - The Easy Way to Share Your Files via Twitter
• Twtmailer - Get @replies straight to your inbox

Favourites

• Favrd - FAVRD lists interesting things that show up on Twitter, based on the number of times an item has been declared a favorite
• FavTweets - Get you friends or your fav tweets
• DivVoted - Divvoted lets you vote for your favourite sites with Twitter
• Favstar - Recent tweets with 100 favs or more
• Twitfav - Twitfave looks at twitter users favourites to tell you about the most interesting tweets and who favourited your tweets
• Feedly - Feedly weaves your favorite content into a fun, magazine-like start page
• Favotter - A collection of popular tweets from your favorites on Twitter
• FavTwits - Find your Favorite Tweeters

File Sharing

• Tweetcube - Allows you to share files on Twitter
• Acamin - Share files with your Twitter friends
• Filetwt - File sharing on Twitter
• FileSocial - FileSocial allows you to share any file through your Twitter account
• TwitDoc - The easy way to share your documents on Twitter

Filtering

• Twalala -You can filter tweets out of your stream by keywords and phrases or mute individuals who get a bit too chatty
• SiteVolume - See how many times a word appears on a site
• TweetVolume - See how many times a word appears on Twitter
• ConvoMonitor - Where to track things on Twitter
• justSignal - Social media without the noise
• Twhanel - Create your own Twitter channel
• Monitter - lets you “monitter” the twitter world for a set of keywords and watch what people are saying
• ListOfTweets - Create a list of tweets
• Twitterel - Find Twitter users with related interests
• Followize - Cut through the noise, follow the conversation
• Tweetree - Tweetree puts your Twitter stream in a tree so you can see the posts people are replying to in context
• Twups - Twups is a twitter aggregator, pulling the most popular twitter topics into one place
• Qapture - Captures and ranks the links being shared right now by some of the most interesting folks on Twitter
• Filttr - Tool for filtering
• TwitZap - lets you subscribe to realtime Twitter channels based on your interests
• TwitterHawk - Targeted marketing on Twitter
• Twitterwall - Build your own Twitter wall
• Tweetchat - TweetChat helps put your blinders on to the Twitter-sphere while you monitor and chat about one topic
• TrackingTwitter - Twitter Tracker is a real-time listing of the top media, entertainment, and consumer product feeds
• TweetChannel -  TweetChannel makes it possible to create channels by Twitter
• TwitterDigest - Pick the usernames you’d like to generate a digest for, and you will see all updates made by them
• Tweader - Read Twitter conversations
• TweetIQ - TwitIQ is an enhanced Twitter interface that provides insight into your Twitter stream and Twitter followers
• TwitterFriends - find out the hidden network of Twitter contacts that are really relevant for you
• Twitterpipe - The Twitter information pipeline
• RealTimeChatterbox - Twitter Search:  Filtered, Moderated, Managed
• Tweetrak - Track tweets

Finance

• Twitpay - Send payments via Twitter and fund those payments via PayPal
• WhatsYourTweetWorth - Get a feel for how valuable you are on Twitter
• SuperChirp - tweets so good they’re worth paying for
• Twtmarket - Offer what others need
• TweetWhatYouSpend - Cash tracking made simple through Twitter
• StockTwits - Real investors, real ideas, real time
• Twinancial - Twinancial brings you all the latest personal finance tweets from around the globe.
• Chart.ly – Share stock charts on Twitter
• Twollars - The currency of appreciation
• Tazaar - Your Twitter bazaar
• CheapTweets - Twitter deals
• Tweetbucks - Shorten any URL and make money
• TweetValue - How much is your Twitter profile worth
• Tweba - The social marketplace

Follow and Unfollow

• Flashtweet - Bulk follow/unfollow tool for Twitter
• Twittangle - Untangling the mess of too many friends
• Refollow - Refollow helps you discover, manage, and protect your Twitter social circle
• TwitsLikeMe - Find new friends on Twitter
• Doesfollow - Find out who follows whom on Twitter
• Twitroduce – Connect on Twitter
• MyCleenr - The best way to clean your Twitter contact list
• TweeterGetter - Get new Twitter followers
• TwitterLamp - The SMART Way To Follow People On Twitter
• TweetSum - Follow and unfollow people via drag and drop
• TwitterForBusyPeople - Friends at a glance
• Twitter Karma – Find out who is following and unfollowing you
• TweepMe - Get Twitter followers
• Twitterless - Get updates when someone stops following you on Twitter
• Twiping - Twitter contact management software
• Qwitter - Qwitter e-mails you when someone stops following you on Twitter
• TwitterRatio - Twitter follower/friend ratio
• FriendOrFollow - Who are you following that’s not following you back? Who’s following you that you’re not following back?
• Twitseeker - Who you are looking for by what they are talking about
• TweepDiff - Find out who you are missing on Twitter
• Twollo - Twitter auto-follow
• Twittermass - Twitter management and optimiztion services
• Twitnest - Visualisation of your followers and theirs
• Twitter100 - With Twitter100, you can see your followers at a glance (up to 100)
• Tweepler - To follow or not follow that is the question
• Who follows whom - The quickest way to see who several Twitter users have in common
• Buzzom - Social profile management
• Hummingbird - The Pro Tool for Twitter Marketing at $200
• Twubble - Twubble can help expand your Twitter bubble
• WhoshouldIfollow - Find new Twitter friends
• Tweepi - A geekier, faster way to manage Twitter
• TwitterSnooze - Hit the snooze button on your “verbose” Twitter friends
• iFollowBack - Follow back people
• Twitterator - Follow a bunch of people in one go
• Twtrfrnd - Discover your common shared friends
• Mutuality - Alows you to make bulk operations with your account
• TweetPenguin - find new Twitter followers with similar interests
• Less Friends – Do the people you follow on Twitter, follow you?
• TweetEffect - When did you lose or gain Twitter followers?
• WhoTheTweet - Fins out what someone is tweeting about
• Twollow - Auto follow people on Twitter
• Tweepular - Manage your followers
• TwerpScan - Checks the number of followers on your contact list, the number of people they are following, and the ratio between those
• MyTweeple - Manage your Twitter Friends and Followers
• MyTwitterButler - Automatically follows Twitter users based on “keywords”
• Twitoria - How many friends are you are following?
• ExecTweets - Find and follow top business execs on Twitter
• TwitHive - Monitor and Interact with the Twitter Hive Mind
• Foller.me – Before you follow..
• FollowLists - Create and share lists of your Twitter friends
• FriendMePlease - The easiest way to make new friends on Twitter
• UnTweeps - Unfollow tweeps who have not posted tweets recently
• Sherflock - Find and track your flock

#followfriday

• #followfriday statistics – Lists the most popular tweeps on #followfriday
• TopFollowFriday - See who endorses you and who endorses whom
• NewFollowFriday - Get to know your Twitter followers better
• TweeHits - FollowFriday based hitlist

Food and Drink

• Foamee - Do you owe someone a drink?
• FoodFeed - What are you eating?
• TweetWhatYouEat - Keep a food diary
• TweetYourEats - Helping you track everything you put in your mouth

Fun

• ComedyTweet - All the hottest comedians on Twitter
• TwitLOL - Funniest tweets in under 140 characters
• KnowYourMojo - Know your Twitter mojo
• Twitmarks - Guess your twitter gender
• Poke.ly – Poke people on Twitter
• SponsoraLoser - Sponsor a loser

Games

• Fast140 - Twitter speed typing game
• TweetMyGaming - Tweet My Gaming is a real-time feed of video game conversations happening on Twitter
• Twrivia - Daily trivia quiz on Twitter
• ChessTweets - Play chess on Twitter
• Tweedeogame - Twitter video game
• Twee60 - Xbox Live to Twitter Updater
• WhoseTweet - This is a fast-paced game for Twitter junkies
• Twivial - Play trivia on Twitter
• TweetyPants - Are your Twitter friends smarty-pantses?
• Outwitme - Outwit other Twitter users

Gifts and Presents

• Twtwlst - A simple gift registry Twitter app
• Twesents - Send virtual gifts to your friends
• Tweetgift - Tweetgift is a simple way to show a little appreciation to a friend
• Tweetmas - What would you like for Christmas

Groups

• Tweetizen - Filter tweets and create groups
• Twitly - You can seperate the poeple you follow on Twitter into groups
• ConnectTweet - ConnectTweet allows the contributors to your central Twitter stream
• GroupTweet - Group message broadcasting for Twitter
• TwitBot - Allows multiple people to publish to a single Twitter account
• Twinester - Twinester lets you create or join groups and communities for Twitter.
• Crowdstatus - Create your own crowds
• TweetKnot - Tying people togetherTying people together
• Social - Twitter for events and groups
• Twitter Groups – Twitter Groups
• Twibes - Twitter Groups
• ThinkClimbing - Find and connect with Climbers on Twitter
• Tweetworks - With groups and discussions, TweetWorks helps you get the most out of Twitter
• Tweetparty - Group messaging for Twitter

Jobs

• Twitter Job Finder – Real time job search
• TwitterJobSearch - A job search engine for Twitter
• TweetJobSearch - Search jobs on Twitter
• TweetsMyJobs - Job postings sent to you via Twitter

Maps and Location

• Twittearth - Live twitts all over the world
• Twittervision - See where Twitter users tweet in realtime
• mmmeeja - Plot Your Twitter Followers On A Map
• TwitArea - Sharing places on twitter
• TweetMapper - Where your tweets are
• geoTwitterous - Shows where someone is Twittering from
• GeoChirp - Twitter and Google maps mashup
• Happn.in – Happn.in shows you what people are twittering about in your city
• geoTwitter - Google Maps and Twitter mashup
• Tweetmondo - Find Twitter users near you
• TwitterLocal - Find tweets based on location
• Nearby Tweets – Instantly find Twitterers nearby
• TwitterMap - Shows tweets on the map
• TwtMaps - Get a map that shows all your friends locations
• Tmeet.me – Where do you want to meet?
• Atlas - See tweets from around the world
• ChirpCity - Local Twitter stuff
• LocalTweeps - Help localize the Twittersphere
• Stweet - Google Maps and Twitter integrated
• Geo.ly – Share your maps with short URLs
• Twuzzer - Find out what’s being twittered in your neck of the woods
• Twaller - Discover what travellers are tweeting about
• Tweeple of India - Tweeple of India
• MyTweetMap - Shows where someone is Twittering from
• SadakMap - Twitter messages on a map
• Boarding - Find stranded passengers

Mobile

• Twitterrific - Twitter client for Mac desktop and iPhone
• Tweetie - Twitter client for iPhone
• Twitterfon - Simple, Clean, and Fast Twitter Client for iPhone and iPod Touch
• Twitroid - The premium Android Twitter client
• TwitterDroid - TwitterDroid is a clone of Twitterific designed for Android
• LaTwit - iPhone Twitter client
• Wildsets - Twitter client for mobile phones
• TwitToday - Today Screen widget for Windows Mobile
• Twitxr - Share pictures and status updates from your mobile
• TinyTwitter - Mobile Twitter app
• MobyPicture - Post to your blog and Twitter through your mobile phone
• Twim - Mobile Twitter Client
• TreoTwit- Twitter client for Treo
• LogPost - Twitter for mobile phones
• BlackBird - A Twitter client for BlackBerry smartphones
• Gravity - The S60 Twitter client
• Twikini - Twitter on the go from your Windows phone
• TwitterBerry - TwitterBerry is mobile client for BlackBerry
• UberTwitter - Twitter client for BlackBerry
• Pocketwit - A Twitter client for the Windows Professional platform
• Quakk - Quakk is an Open Source Windows Mobile Twitter Application
• PocketTweets - Twitter for your iPhone
• jibjib - An Open Source J2ME Twitter Client
• Snaptu - Twitter mobile app
• Twitter2Go - Mobile phone app
• TwitStat - Mobile Twitter app
• Hahlo - Fully featured Twitter client for your iPhone or iPod Touch
• GPS Twit – iPhone Twitter app
• Twitli - Twitter client for Android phones
• Qik - Share live video from your mobile
• MotionObj - Twitter client for your iPhone or iPod Touch
• ceTwit - ceTwit is a windows mobile twitter client written in c# leveraging the .net compact framework
• Twapper - Twitter mobile for WAP
• Twobile - Twitter client for users of Windows Mobile Pocket PCs
• JustUpdate - Just an update field, just for Twitter, just for your iPhone/iPod Touch
• SimplyTweet - Twitter client for iPhone or iPod Touch
• jTwitter - Java Twitter app
• uTweetMe - Twitter client for mobiles supporting Java
• ReTweet - Twitter tool for iPhone and iPod touch
• miTreo - Twitter app for Palm OS
• iTwtr - An open source Twitter client for iPhones
• Tweetstack - Organise your Twitter stream
• Twittai - Java mobile client for Twitter
• uTweetMe - uTweetMe is a free J2ME cell phone client application which allows posting updates to Twitter
• Twitter for iPhone – Twitter for iPhone app

Multiple Accounts

• Matt (Mattinator) – Multiple account Twitter tweeter
• Tweet3 - Manage one or more Twitter accounts
• Hootsuite - You can manage multiple Twitter profiles, pre-schedule tweets, and measure your success
• Splitweet - Twitter multi account manager and brand monitor
• TwitterFace - Twitterface is a web-based, personally-branded, multi-account Twitter interface
• EasyTweets - Web based Twitter multi account management
• Twibble - Manage up to 3 different Twitter accounts
• Twittbot - Allows multiple people to publish to a single Twitter account, and for a single person to post to multiple Twitter accounts

Music

• Song.ly – Lets you share music links on Twitter
• Imeem - What is on your playlist?
• Blip.fm – Create your own music station
• Twt.fm – twt.fm lets you share music on Twitter
• Songtwit - Share music on Twitter
• Tinysong - Tinysong allows you to quickly share music links with your friends
• Twiturm - Share your music on Twitter
• Musebin - Music on Twitter
• Twisten.fm -Twisten.fm crawls Twitter for tweets about music then you listen to them

News

• Tweetmeme - Hottest stories on Twitter
• Twistori - Find out what twitter loves, hates, thinks, believes, feels, wishes
• StumbleTweets - Stumble what’s happening right now
• TwitterPark - The world of Twitter news
• Twitscoop - Search and follow what’s buzzing on twitter in real-time
• Lovetweet - A real-time feed with tweets of love
• Flackr - Breaking news
• Tlurk - Turn twitter accounts into public news sources
• TweetOnTheStreet - Twitter based rumour mill
• Tweetmi - Real-time Twitter Topics
• Twitterfall - Updates fall from the top of the page in near-realtime

Other

• Cursebird - What the f#@! is everyone swearing about?
• Bkkeeper - Track your reading and bookmark on the go
• Infinite Monkey Comics – Tweet your funniest creations
• TweetLOL - Funny tweets
• SickCity - Realtime disease detection for your city from messages on Twitter
• MyTweet16 - View any user’s first tweets
• SimilarSites - Helps you find similar sites
• CommuterFeed - Traffic and Transit updates using Twitter
• Excla.im – Is a jabber bot that allows you to update your twitter status very simply
• cTwitterLike - See twitter in another user’s view
• TrackDailyGoals - Accomplish your life goals with public commitment on Twitter
• Twurn - Whose twurn is it?
• 21Tweets - Twitter life coaching
• ePenis - What’s the size of your Twitter ePenis
• The Longest Poem in the World -Is composed by aggregating real-time public twitter updates and selecting those that rhyme
• Twypos - A collection of Twitter typos
• TwitHelp - Give and get help in the Twitter community
• TweeSpeed - The Twitter Instant Speed Meter
• Thatswh.at – That’s what she said
• PizzaTweetup - Post a pizza tweetup
• MyFlightInfo - Track flight status with Twitter
• InnerTwitter - Become enlightened
• Twitter on Paper – Putting Tweets On Paper
• SecretTweet - Post your secrets to Twitter anonymously
• Twash - Worthy tweets that should be remembered
• Twizon - Where Twitter meets Amazon
• Grafitter - Visualising your life on Twitter
• Twickly - The twitter tool for quick tweeting
• Tweeterology - The twitterverse on the weather
• Weird Habit – What is your weird habit
• TweetWants - This is a collection of stuff you want
• All Your Tweet – Provides many features found scattered around the internet and combines them into one integrated service
• TrackThis - Track UPS/Fedex/USPS/DHL packages over Twitter
• Twittas - Twitter playground
• Snipt - Share code snippets on Twitter
• Drunktwt - Anonymous, uncensored twitter updates for everyone
• DreamTweet - What are you dreaming
• gtFtr - Get fitter with Twitter
• TweetBook - Get your twitter updates, favorites in a fine pdf e-book
• Tweetfails - A collection of stuff that fails
• LinkBunch - Put multiple links into one
• TwiHotels - Hotel queries
• WhenDidYouJoinTwitter - When did you join Twitter
• TweetDreams - Dream tweets
• TwtTrip - A simple travel organiser Twitter app
• VacaTweet - Twitter vacation auto-response
• Tweeterized - Twitter signature images
• DNtwits - Sell domains on Twitter
• Twitter Magnets – A delicate push
• Twoogie MD – Update your Twitter, Doogie style
• Twaction - Twaction is a simple site that turns your tweets on Twitter into actions
• Huitter - Twitter’s cheats, tweaks, tools
• Twenglish - The twool that lets you tweat like a twird
• Mr Milestone – Mr Milestone will send you a tweet when you meet certain milestones of followers
• Posti.ca – Send sticky notes using twitter
• BakerTweet - BakerTweet is a way for busy bakers to tell the world that something hot and fresh has just come out of the oven
• Twitterspread - Do something good, or go home
• TweetOclock - Find out when it’s the best time to tweet someone
• GreenTweets - Displays tweets that are green by nature
• Social Collider - The Social Collider reveals cross-connections between conversations on Twitter
• Tweleted - Recover deleted tweets
• TweetGrid - Create a Twitter search dashboard that updates in realtime
• TwittaScope - Your horoscope tweeted to your Twitter account
• TwtCard - A sample greeting card Twitter app
• Tweetwasters - How much time do you spend on Twitter?
• Twyric - The poetic side of Twitter
• Twitition - Create petitions using Twitter
• TinyPetition - Petitions on Twitter
• HarmonyTweets - Toyota Prius
• TheTweetWall - lets you find and network with popular tweeple and get your twitter profile to be recognized!
• Everytweet - Random tweets
• Tweetaways - Is an easy way to pick a random winner for your next twitter contest or giveaway
• Moochfly - Keeps track of things you lend to friends
• TwitterSticker - Get your own custom Twitter Sticker with your latest status update
• Helveti-Tweet – Shows tweets about Helvetica
• TimeTweets - Where tweets go tick tock
• Twitter Spectrum – Twitter patterns
• TwitterPoster - Provides a visual representation of the degree of influence of the Twitter users
• FuelFrog - Track Your Gas Mileage
• Twackle - Your sportbar in the twittersphere
• FlipmyTweet - Flip your tweets
• Tweetfight - Insert your Twitter screenname and fight
• Twitdom - The Twitter applications database
• TwitterWeather - Twitter weather
• Twitpocalypse - The Twitpocalypse is similar to the Y2K bug
• Twuoted - Quotes from Twitter
• Smiley tweet – Ranks words for happiness or sadness using the amount of twitts with happy or sad smileys for each one

Photos and Video

• TwitPic - TwitPic lets you share photos on Twitter
• FlickToTwitt - Post a photo to flickr and announce it right away on Twitter
• Twitsig - Your tweets as images
• Twiddeo - Twitter with video
• Flittr - Picture your words
• Twi.tt – Anything and everything
• TwitnGo - Quick photo posts to Twitter
• TwitImg - Keep everyone up to date by using your latest Twitter status, displayed in the form of an appealing image
• Twixxer - Share and view photos and videos on Twitter
• Twitgoo - Share your pictures on Twitter
• SnapTweet - Send your Flickr photos to Twitter
• MessageDance - Add photo, video and music to your regular tweet
• Visual Twitter – Twitter pix
• Portwiture - Your Twitter status in photos
• 2Tweet - Tweet multiple photos and videos
• Zannel - Instantly share your pics, videos and text to Twitter
• ScreenTweet - ScreenTweet shares videos, pictures, screen shots, and images on Twitter
• Greetter - Share photos and videos on Twitter
• img.ly – Photo sharing service for Twitter
• TweeTube - Sharing stuff on Twitter
• Tweetphoto - Photo sharing made simple
• TweetMojo - Share your videos, webcam, photos, docs and more on Twitter
• Lolwrus - Twitter + flickr = LOL
• Twittergram - Send your Flickr pix to Twitter and show people what you’re up to
• AutoPostr - The flickr to twittr automata
• Twitpickr - an easy way to upload your TwitPic images to Flickr
• Yfrog - Share your images and videos on Twitter

Polls

• StrawPoll - Tiny polls in 140 characters or less
• NewFollowNotify - automatically send new followers a direct message with a link to a questionnaire
• Twtpoll - A simple survey Twitter app
• Poll your followers – Put a poll on your Twitter page

Popularity and Rank

• Toptweet – The world’s top Twitter personalities, all in one place
• Twitrankme - Twitter profile rank
• DailyRT - The most popular tweets on the web
• Twitturls - Popular Twitter links
• TwitterScore - How does your Twitter profile score
• Twispot - Hottest tweets in one spot
• Chirpio - A place to rate & follow Twitter users
• Twinfluence - Twitter Influence Analyser
• Tweeting too Hard – Where self-important tweets get the recognition they deserve
• Twtpets - Who has the cutest pet
• Tweeple Rank – Ranking the top recommended people on Twitter
• Twielsen - TV ratings based on social media chatter
• HereBeforeYou - Were you here before your friends
• TrazzlerBuzz - Tracking popular places on Twitter
• Twittypop - Who is the hottest boy or girl on Twitter?
• Twitemperature - How hot are you
• Tweeght - Popular thoughts and quotes shared on Twitter
• Tweeterate - Rate the tweets you get from your friends
• Twitrank - Is a list of the top 150 Twitterers
• Twitalyzer - Tracking influence and measuring success
• Twitterholic - Find out who the top twitter users are
• Popular Tweets – A compilation of the top 10 tweets
• TwitterLinkr - Populare links people are tweeting on Twitter
• Twittergrader - Measure the power and authority of your Twitter profile
• Top Twitter Friends – Who do you talk to most often on Twitter
• Tweettop - Who to follow on Twitter
• Tweetrank - Twitter ranking
• Twigheaded - Find out how big headed someone is on Twitter
• MrTweet - Your personal networking assistant
• TweetoftheYear - Tweet of the Year

Print

• Print Your Twitter – Print all your tweets
• TwitPrint - A Twitter printer

Psych

• TweetPsych - Build a psychological profile of a person based on the content of their tweets
• HappyTweets - Happytweets is a measuring stick for how positive, or happy, a particular Tweep is

Professional

• Tweetlaw - Connect and tweet with legal professionals
• Tweetlister - Twitter tool for posting all types of property listings
• Tweetminister - TweetMinster the place where real life and politics tweet
• TweetCongress - A grassroots effort to get Congress tweeting

Q&A

• TweetBrain - What is your question
• TwitterMeThis - Follow.. answer questions.. win cash
• twAnswers - Share your knowledge on Twitter
• twitQA - Ask or answer on Twitter
• TwitterAnswers - Twitter Answers is a Q&A mashup using Twitter and Mosio

Retweet

• Retweetist - Discovering trends, popular topics and popular people by tracking Retweets across Twitter
• Retweetit - Twitter Retweet Exchange
• ReTwitd - Retweets
• TweetMyLink - Tweeted links
• Retweetrank - Find any twitterer’s re-tweetrank
• Plzrt - Please retweet me
• Please Retweet Me – Please retweet me
• Retweetradar - Finding trends in the mountains of information ‘retweet’ed on Twitter
• ReTweetability Index – The ReTweetability Index measures and ranks Twitter users based on the infectious power of their tweets

Reviews

• Microrevie.ws – Micro reviews
• Notches - Twitter reviews
• FilmReviewFriday - FilmReviewFriday is a place for you to share your tweet-sized film reviews
• TwitterCritic - Film reviews by Twitter users

RSS

• Twitterfeed - Feed your blog’s RSS feed to Twitter
• PingVine - Pingvine takes RSS feeds from your blog and posts them to Twitter
• RSS2Twitter - Share any RSS feed on Twitter, and have new RSS items automatically be tweeted
• RSStoTwitter - RSS feeds to Twitter
• FeedTweeter - Feed your RSS items to Twitter with some spice
• TweetWire - List your feed now
• FlockOTweets - Groups your followers into RSS chunks
• RSSFriends - Track changes in friends list or follower and unfollower on Twitter with an RSS Feed

Schedule Tweets

• Tweetlater - Schedule tweets
• TwitResponse - Setup unlimited messages to be delivered to your twitter page when you want
• FutureTweets - Schedule your tweets
• AutoTweeter - Java based Twitter app that enables you to schedule your tweets
• Twuffer - Twuffer allows the Twitter user to compose a list of future tweets, and schedule their release
• Twitomate - Queue tweets to publish
• Twaitter - Twitter scheduler

Search

• Twitter Search – Twitter search
• Advanced Twitter Search – Advanced Twitter search
• BingTweets - Fusing Twitter trends with Bing insights
• CrowdEye - Real time Twitter search
• Twicsy - Search Twitter images
• TwiPho - Search Twitter photos
• Heapr - Search Google, WolframAlpha, Twitter, Flickr
• Twitterment - Search engine for Twitter
• Icerocket - Twitter search
• Twithority - Twitter Search by Authority
• Twitority - Authority based Twitter search
• TweetRSVP - TweetRSVP is an automated search engine that pulls tweets with questions and requests for information
• Collecta - Real time search engine
• TweepSearch - Twitter profile and bio search
• Twitterverse – Search through archived public timelines and tweets
• Twitmatic - Realtime video search
• PicFrog - Real time image search
• Tweetzi - Realtime Twitter search and trends
• TweepFind - Tweeps search by rank and skills
• serendipiTwitterous - Search for tweets of a certain person using certain keywords
• TweedleDM - Search your DMs
• BackTweets - Search for links on Twitter
• TwitterPowerSearch - Realtime Twitter search
• Twuet - Twitter search engine
• Tweefind - The Twitter search by user rank
• DuckDuckGo - Duck Duck Go is a new search engine with less garbage and better results
• Twoogle – Search Twitter and Google Simultaneously
• Twiogle - Search Twitter and Google at the same time
• TweetScan - Microblog search
• TwoQuick - Simple Google + Twitter search
• Topsy - A search engine powered by tweets
• Flaptor - Flaptor Twitter search
• Visible Tweets – What tweets do you want to visualise
• Freesearch - Find people on the web – from Twitter

Social Media (Other)

• TwitterBook - Lets you use your Facebook status to update your Twitter account
• Selective Twitter Status - Update your Facebook Status from Twitter
• Twitter2GTalk -Twitter2gTalk takes your tweets and sets them as your gTalk status/away message
• Zellr - ZellR.com is a social networking site / aggregator for social network sites which lets you to assign a profile to your twitter account
• TweetSync - Allows you to sync your Twitter tweets with your Facebook status
• FB140 - Find all of your facebook friends who are using Twitter
• AlertThingy - Your social desktop
• SocialToo - Your companion to the social web
• PeopleBrowser - Twitter client
• Twip.me – Check and update your twitter account from your favorite IM service
• Feedalizer - Twitter, Facebook, FriendFeed, Flickr app on Adobe Air
• Twitku - A free social network mashup
• @Tweeter – Tweeter is a Twitter Interface that allows you to post new tweets through Facebook
• Tweetburner - Track links you share on Twitter and FriendFeed
• Tweetpo.st – A smarter way to update Facebook from Twitter
• Tinker - Follow live conversations from Twitter and Facebook
• Twitter updater – copy your status from Facebook to Twitter automatically

Spam

• Tweetblocker - Cleaning up the twitterverse
• TwitChuck - Taking on Twitter spam

Spy

• OverheardIt - Eavesdropping on Twitter
• Spy - Spy can listen in on the social media conversations
• TwitterSpy - Spy on the Twitter public timeline in realtime
• SpyTwitter - Spy on your Twitter friends

Statistics and Graphs

• TwitGraph - Twitter statistics
• MyTwitterWeighsaTon - Analyzes and counts related words in your Twitterstream to determine what you’re tweeting about the most
• TwitterAnalyzer - Analyze your way
• Tweetstats - Graphs and stats
• TweetPlot - Charting/Plotting via Twitter
• SiteTweet - Real-time Twitter metrics for your site
• TwitterVenn - Twitter venn diagram
• Uladoo - Chart Your Life
• TweetSentiments - Analyzes tweets on Twitter to check the happiness quotient
• TwitterCounter - The ultimate Twitter statistics provider
• TwitterCharts - Tweets by Time of Day & Day of Week
• TwitterThoughts - Twitter thoughts
• TweetActive - Compare stats
• Tweepletwak - Tweeple management and analytics
• Roll the Dice – Generate random events
• Tweetrush - Real time Twitter user and client stats

T-Shirt

• Twitoshirt - T-shirts with your own tweets
• TwitShirt - Put your tweets on a T-Shirt
• 140tees - Make your own Twittered T-shirt
• Threadless - Tweets on tees

Tag

• Twubs - #hashtags made useful
• CalendarTweet - Tag, share and promote events on Twitter
• The Twitter Tag Project – Tag, you’re it
• Supafu - Tag twitterers with a tweet
• Twemes - Global tags for twitter
• TweeterTags - Find similar people on Twitter
• Tweetag - Browse the twittosphere

Talk

• TwitterFone - Send messages to Twitter using voice
• TweetYak - Speak. Record. Tweet.
• Twitwoop - Use your phone to send voice messages to Twitter
• Trottr - Hear I am
• Phweet - Talk now to your Twitter friends
• CallTweet - Send Twitter updates using your voice
• GuaGee - Voice messages for Twitter
• VoiceBoo - VoiceBoo Verified is a new and social way to verify users by using their voice
• Twitsay - Give your Twitter account a voice

Threads

• TweetConvo - Thread Twitter conversations
• Twickie -The Easiest Way to Archive a Twitter Response Thread
• Twonvo - Thread Twitter conversations

To Do

• Toodledo - Online to do list
• Twit2do - To do list for Twitter
• Remember The Milk - To do list for Twitter
• TwitrDoo – A simple To-Do List

Toilet

• PoopTag - Twittering while you poop
• PoopStream - Watching the world go down the toilet
• Twishitter - Twittering while on the can

Translation

• Twi8r - translating from English to text message shorthand and vice versa
• TweetTranslate - Automatically translate tweets into over 40 languages
• XLHit - Translated real-time search
• Twinslator - Translate your Twitter posts
• Post like a Pirate – Your pirate translator
• Twitrans - Translate your tweets

Trends

• Top News Trends - Top news trends on Twitter
• Twist - See trends in Twitter
• Twendz - Exploring Twitter conversations and sentiments
• TweetTabs - Realtime Twitter trends and search
• Trendmetr - Live Twitter buzz monitoring
• Twopular - Popular trends on Twitter
• What The Trend – Find out what’s trending on Twitter and why

Websites, Blogs and Widgets

• Twittercal - Connects your Twitter account with your Google Calendar
• TweetRoll - Show how many followers you have
• Big Tweet – BigTweet sends tweets from any web page
• TweetRemote - TweetRemote merges Twitter and blogging in a unique way that lets you decide when and how your tweets are included on your blog
• Twidget - Twidget is a free Dashboard Widget for OS X that allows you to update your Twitter status
• Twoxit - Tweet on any site anytime
• Tweetsnap - Twitter badges, images and banners for websites
• Twittinesis - Publish your tweets on your blog
• Tweetvisor - Browser client
• TwitrGrid - Turn your Twitter tweeps into a cool mosaic grid for your blog or profile
• TwitterSplit - Put your own URL in front of an external URL when you tweet
• SayTweet - Your Twitter bage, your picture
• SquakThis - Quick Tweets From Any Page
• SumtnSumtn - Bring Twitter to your website
• TwitWall - Instant blogging companion
• ClickToTweet - The easy way to add a pre-made ‘Tweet About This Site’ – link to your website
• Twitabit - A simple way to communicate that stays up when Twitter is down
• Twiddict - Ensures tweets end up where they should be during Twitter downtime
• Fleck - Annote the web
• AddTweets - add your latest tweets to a blog or website
• TwitThis - Allows people to tweet information from your site
• Tweet All About It – Tweet quotes and bits from webpages
• TBuzz - Tweet and track the buzz on any webpage with Twitter
• Twitterati - Twitter badge
• TweetRooster - Enables users to tweet directly from your website or blog
• Twitturly - Tracks and ranks what URLs people are talking about on Twitter
• TweetThisText - I wish I could highlight some text on a page, click a button, and tweet that text as a quote
• LoudTwitter - Shipping tweets to your blog daily
• TweetPkr - Take a peek at your friends Twitter updates from anywhere
• Twitter Widgets – Widgets from the official Twitter site
• TwitterSalt - Update any website quickly & easily with Twitter
• Twiggit - Twitter meets Digg
• TwitThat - Post current page to Twitter
• Twitter Tools – Allows you to pull your tweets into your blog and create new tweets on blog posts and from within WordPress
• TwitterKeys - Enhance your Twitter conversations
• iTweet - Interface for Twitter
• Twitterlights - Hightlight internet snippets and Twitter them
• Zhuyo - Twitter Followers Box is a small widget you can add to your web page

Wish

• Twishlistter - Your wishes are tweets
• TwitWishList - Share Your Wish List on Twitter