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

Ads

• Twittertise - Advertise on Twitter
• Twitterad - Monetize your twitter profile
• TwitterCard - Place a 125×125 TwitterCard on your Blog or as an Advertisement
• Adcause - Saving the world one tweet at a time
• 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
• 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
• 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
• 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
• Feedly - Feedly weaves your favorite content into a fun, magazine-like start page
• TweetIE - Twitter IE plugin
• 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
• 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

Celebrity

• Celebrifeed - Celebrifeed allows you to follow and interact with your favorite celebrities on Twitter
• CelebrityTweet - Stalk celebrities on 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

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
  
• 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
• 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
• 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

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
• 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
• 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
• FavTweets - Get you friends or your fav tweets
• Twitfav - Twitfave looks at twitter users favourites to tell you about the most interesting tweets and who favourited your tweets
• 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
• TipJoy - Simple social payments for great people, causes & content
• TweetWhatYouSpend - Cash tracking made simple through Twitter
• StockTwits - Real investors, real ideas, real time
• 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
• MyCleenr - The best way to clean your Twitter contact list
• TweeterGetter - Get new Twitter followers
• 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
• 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
• 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
• Hummingbird - The Pro Tool for Twitter Marketing at $200
• Twubble - Twubble can help expand your Twitter bubble
• WhoshouldIfollow - Find new Twitter friends
• 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

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
• Poke.ly – Poke people on Twitter

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
• 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
• TweetMapper - Where your tweets are
• geoTwitterous - Shows where someone is Twittering from
• 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
• Atlas - See tweets from around the world
• ChirpCity - Local Twitter stuff
• LocalTweeps - Help localize the Twittersphere
• Stweet - Google Maps and Twitter integrated
• Twuzzer - Find out what’s being twittered in your neck of the woods
• 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
• 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
• Tlurk - Turn twitter accounts into public news sources
• 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
• TrackDailyGoals - Accomplish your life goals with public commitment on Twitter
• Twonate - Giving is good
• 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
• 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
• 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?
• TwitChuck - Taking on Twitter spam
• Twyric - The poetic side of Twitter
• Twitition - Create petitions using Twitter
• TinyPetition - Petitions on Twitter
• 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
• 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
• 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
• 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 succes