Twubble Twubble is a Twitter extension that helps you find more friends.
Twitter Follower-Friend Ratio Your Twitter ratio is the ratio of your followers to friends (i.e. people you follow). It is measured with the TFF ratio (Twitter follower to friend ratio). The higher the ratio, the more Twitter heat you pack.
Nearby Tweets Who is tweeting close to you? This app helps you connect with them.
Search Twitter Apps
WhosTalkin WhosTalkin is a tool that allows users to search for conversations on the topics they care about most.
Twitter Search Search Twitter is an excellent search engine that allows you to find out what’s happening in the world beyond your personal timeline.
Twitter Tools This plug-in integrates your WordPress blog and Twitter account. Pull your tweets into your blog, and create new tweets from blog posts from within WordPress.
Twitpress Twitpress is a WordPress plug-in that submits a user-definable tweet to your Twitter account, notifying Twitter followers or friends that you have posted a new blog entry.
SimpleTwitter SimpleTwitter allows you to add Twitter messages to WordPress templates (and not just in the sidebar).
Tweet This A plug-in that adds a Twitter link to every post and page on your WordPress website, so that visitors can share your blog entries through their Twitter accounts. It also shortens URLs automatically.
TweetBacks This plug-in imports any tweets that discuss your blog or post. The tweets appear as comments.
TwitterCounter Install TwitterCounter on your blog to display the number of followers you have on Twitter.
MyTwitter MyTwitter allows you to display your Tweets on your WordPress website and update your status on the MyTwitter settings page.
TweetRoll With the TweetRoll widget, you can display the number of your followers and friends.
Twitt-Twoo Twitt-Twoo is a simple little plug-in that allows you to update your Twitter status right from your blog’s sidebar.
Adobe Air Twitter Apps
Toro for Twitter Designed to be simple, Toro uses an experimental Twitter client library to remove the Twitter API limit.
twhirl Most of the features available on the Twitter website are accessible through twhirl, with usability enhancements.
Tweetr Tweetr is a Twitter client that allows you to send and receive Twitter messages, but with some added cool features: support for taking photos with your webcam and sending files (up to 10 MB).
TweetDeck TweetDeck aims to improve the existing functionality of Twitter by taking the abundance of Twitter feeds and breaking it down into more manageable bite-sized pieces.
DestroyTwitter DestroyTwitter is a series of canvases that constantly update to keep tweets current and up to date using notifications that appear as soon as a new tweet is posted.
TwitterLocal TwitterLocal is an Adobe AIR-based app that allows you to filter tweets by location.
Spaz Spaz is a well-designed and well-developed Twitter client.
Snitter Short for “Snooks’ Twitter,” Snitter is a cross-platform desktop Twitter client.
Twitch Some features of Twitch are TwitPic integration, URL shortening, the ability to combine friends and replies, reply-highlighting hash-tag support and more.
Firefox Twitter Extensions
TwitBin TwitBin is a Firefox extension that allows you to keep up with all of your Twitter conversations directly from your browser’s sidebar. Send and receive messages, share links and more.
Power Twitter Power Twitter adds a multitude of features to the Twitter website interface.
TwitterFox This extension adds a tiny icon to the status bar that notifies you when your friends have updated their Twitter status. It also has a small text input field to allow you to update your own status.
Twitzer This Firefox extension lets you post tweets longer than 140 characters on Twitter.
TwitterBar TwitterBar allows you to post to Twitter from the Firefox address bar.
Twitter Search This plug-in gives you quick access to the real-time Twitter search engine.
Hoopla! An essential Twitter plug-in for the Firefox quick search feature.
TwitterEyes TwitterEyes keeps track of your character count as you compose tweets and replaces characters if you need extra room.
Finally, Worth A Look
Is Twitter Down? Is Twitter down just for me or for everyone? This great app gives you a simple answer: yes or no.
twistori An interesting Twitter experiment: click on a keyword on the left, and see what tweets are currently being published that contain that word.
Twittervision A real-time geographic visualization of tweets. Amazing.
twittearth Similar to Twittervision (above) but with a sleeker interface.