BlogRovR – While mainly a tool to help you see linked blog posts as you surf the Web, you can also send out tweets about what you are reading and share them with your followers.
Clipmarks – Clip parts of a Web page that you specifically want to share, and then share them with all of your Twitter followers amongst other services.
DashBlog – DashBlog lets you easily tweet about items you find on the web such as videos, text, quotes, images and more. Also works with Tumblr, WordPress and Blogger
EasyTweets is a set of tools that can help online marketers leverage the power of microblogging. You can use it to post to and switch between multiple Twitter accounts in seconds, check replies, and track new followers.
Feedly– A magazine style feed reader that allows you to tweet about any post you read and find interesting.
Friendbar – See your incoming tweets right in the toolbar as well as post updates of your own. Also works with Facebook friends.
Hashtags #hashtags are an easy way to track a specific topic or event such as the San Diego Fires using the Twitter network. This allows for hyper-instant communication surrounding disaster relief and reporting
Just Tweet It was created to make it easier for people using the popular micro-blogging service Twitter to find other “Tweeters” with similar interests.
Less Friends Do the people you follow on Twitter, follow you? Find out.
Mahalo Share – Share sites you find interesting across multiple services including Twitter.
Power Twitter – Power Twitter adds several features such as revealing the URL behind TinyURLs, embedding of YouTube videos, showing Flickr streams and a whole lot more.
Quotably An interesting services that enables people to follows threads woven throughout twitter conversations.
Snitter is “Snook’s Twitter”: an Adobe AIR-powered application for twittering. Features include: auto-updates tweet list, highlights messages sent to you via @ syntax (and makes a chirp), clear current list of tweets, refresh list of tweets, view 20 most recent items in your timeline and more…
StockTwits – A Firefox add-on that works with the StockTwits site. It will turn any StockTwits tagged tweets on the site into a link back to the StockTwits site so you can follow the conversation.
StrawPollNow Run your own poll on twitter with the new StrawPoll Platform, where you can use your own Twitter account to ask the questions you find interesting.
Tw-autocomplete – Allows for autocomplete of Twitter usernames for @ and D messages as you are typing them on the Twitter site.
TweetBeep is like Google Alerts for Twitter! Put in a keyword or website, and get emails when others tweet it!
TweetDeck Aims to evolve the existing functionality of Twitter by taking an abundance of information i.e twitter feeds, and breaking it down into more manageable bite sized pieces. TweetDeck enables users to split their main feed (All Tweets) into topic or group specific columns allowing a broader overview of tweets.
TweetPattern Check out these nice backgrounds and use it to style your twitter page.
TweetStalk – Adds a “Stalk” button next to the “Follow” button on Twitter so you can follow someone without them knowing it. Can also create an RSS feed of their tweets so you can read them in your favorite reader.
Twemes.com follows public Twitter.com tweets (messages) that have embedded tags that start with a # character. These are sometimes called hashtags. Through the use of twemes, we can all view what people are talking about across the whole Twitter universe.
twhirl is a social software desktop client, based on the Adobe AIR platform. Some of twhirl’s features: runs on both Windows and Mac OSX, connects to multiple Twitter, laconi.ca, Friendfeed and seesmic accounts, notifications on new messages, shorten long URLs, post images to TwitPic and more…
TwitBin is an extension for firefox that brings the power of twitter right in your browser. Where you can quickly and easily send and receive messages via twitter in your firefox browser.
TwitKit is a Twitter sidebar for Firefox. TwitKit has a 6-section interface, using tabs to separate content. You can view the Twitter public timeline, your user timeline, a list of your friends and their latest tweets, a list of your followers and their latest tweets, @replies made to you, and stats about your account.
Twitter Line – Displays incoming tweets from your friends timeline in a toolbar, and allows you to post updates to your own account.
Twitter Search – The name says it all for this handy tool that gives you access to the real-time Twitter search.
Twitter StatusBar – A discrete tool that collapses into your status bar when not in use. Just click on the “T” symbol to bring it up and send out your latest update.
Twitter Toolbar – A toolbar that allows you to post updates any time you want as you browse. Also includes pre-written messages for common sayings on the service.
TwitterBar – Type your tweets in the address bar and press the icon at the end to send them. Also allows you to easily tweet about the page you are currently looking at by leaving it in the address bar when you type out your message.
TwitterEyes – An extension to be used specifically on the Twitter site that will keep track of your characters entered and assist you in shortening your message when necessary.
TwitterFeed This is a fantastic application that automatically post your blog entries to your twitter account by using a tweet feed
TwitterFox is a Firefox extension that notifies you of your friends’ statuses of Twitter by adding a tiny icon on the status bar to update their statuses. Also it has a small text input field to update your status.
TwitterMail When you provide your Twitter credentials they supply you with a TwitterMail email address. For instance firstname.lastname@example.org. If you send an email to that address it will be posted to Twitter.com. Also you can receive your latest twitter-replies automatically by e-mail
Twitterrific is a fun application that lets you both read and publish posts or “tweets” to the Twitter community website. The application’s user interface is clean, concise and designed to take up a minimum of real estate on your Mac’s desktop.
TwitThat – A bookmarklet that lets you tweet about the current Web page you are reading.
Twitturly is a service for tracking what URLs people are talking about as they talk about them on Twitter.
Twitty Tunes Allows to post your currently playing songs to Twitter with a click. As a bonus, you can also post the websites you’re visiting, videos you’re watching and more!
Twitzer is a Firefox extension which lets you post text longer than 140 characters on Twitter.com. It also provides a feature where you can resolve all TinyURL links to actual links so that you are sure you are clicking on safe links.
Yoono In a single browser sidebar, Yoono users can interact with the best of the Web by discovering, communicating, and sharing with friends across multiple networks and platforms all in one place. Gather all of your social networks in one place including Facebook, MySpace, iMeem, Twitter, Flickr, FriendFeed, Youtube, Last.fm, Seeqpod, Piczo.