Chrowety ia a Twitter client for Chromium or Chrome .
Download: http://code.google.com/p/chrowety/ Or: https://chrome.google.com/extensions/detail/ffcbeckjmgmgigkmnhmgjplmomcpfall
Current features:

Follow your Twitter’s lists
Translate tweets
Change Twitter API
Alerts that show you the most recents tweets
Share this video for fast sharing Youtube videos
Share this page button for fast content sharing
See your Home/Mentions/Messages/Favorites timelines
Change tweet font-size for better view
New Retweet (RT still avaiable)
Save [...]

TwitBlack is a Twitter client application for mobile, base on j2me. Most of Twitter features has been implemented on TwitBlack.
Key features: 1 Timeline: Public Timeline, Home Timeline, User Timeline, Favourites. 2 Search: Search, Saved search, User search. 3 Trends: Current, Daily, Weekly. 4 Friendship: Following, Followers, Blocklist, Follow/Unfollow, Block/Unblock. 5 Tweet: New [...]

Pino is Twitter client for Linux desktop. It’s simple and fast. Pino is written in Vala language and compiled to the native binary code.
Download: http://pino-app.appspot.com
Screenshots:

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Turpial is twitter client like Tweetdeck for Linux , It is written in Python and aims to be an application with low consumption of resources and integrate the user’s desktop without sacrificing any functionality.
It is not only wanted to reinvent the wheel (assuming that DestroyTwitter, TweetDeck etc . Are available for Linux), but a customer [...]

BirdHerd makes it easy for groups, teams and brands to update a single Twitter account. Posting is as easy as sending a direct message to the group twitter account.
No more sharing of a single accounts username and password – BirdHerd lets you choose who is authorized to post from your group Twitter account.
No more sharing [...]

PingWire displays images posted on various twitter image sharing sites such as twitpic, yfrog, twitgoo, tweetphoto, mobypicture, img.ly etc.
You get a real-time display with new images scrolling onto the screen. This can be a fun way to view images. Photos with the most retweets are displayed at the bottom of the screen.
Link: http://pingwire.com/
Via: twi5.com
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TwReg is a twitter account register proxy, It’s help you register a twitter if your can not access twitter in your country.
And twreg is a opensource software too, you can install it on your web hosting.
Link: http://twreg.info/
Author : @hfcorriez from twfav team
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A new beta version of Nokia Messaging for social networks has just been released, coming with support for Twitter and thus allowing you to tweet directly from your Nokia phone’s homescreen.
The new Nokia Messaging also features enhanced Facebook support. For example, you can now search friends, view upcoming events and birthdays, or upload pictures and [...]

Nimbuzz is one of my favorite instant messaging clients for Symbian-powered devices for several reasons. For one, I get a Nimbuzz username and password, and all my accounts are stored there. That means, whenever I get a new phone, or reset an existing one, I only have to login once, rather than manually logging [...]

Twfav is a place for you to discover, manage and share hot favorite tweets from Twitter. Just sign in with your Twitter account and enjoy it!
How Twfav Works?
Twfav’s is an application based on Twitter API, you can sign in Twfav just with your Twitter account and all your operations on Twfav will be real-time synchronized [...]

TwitBreeze is a simple free Twitter client for your phone built using Cascada Mobile Breeze. This app supports very basic Twitter functionality with the ability to direct message, follow links and tweet from your phone.
Twitbreeze is a java based app, so its rather light on memory but is also doesn’t make full use of the [...]

Br.st offers the basic features of Brizzly including the ability to edit your status, view your Twitter feed, direct message friends, retweet great content, view trending topics and save searches. But where Brizzly also incorporates Facebook statuses, Br.st forgoes Facebook and concentrates on its URL shortener roots. The company does a great job of ensuring [...]

Seesmic for Windows, whose preview will be available today, is a project that has been in the works for months. The goal was to allow outside developers to more easily integrate their products with Seesmic. The Windows version does that through a plug-in system that’s similar to what you’d find in Firefox.
That functionality is about [...]

Taweet (beta) is a free Twitter application and social calendar that allows people and businesses to streamline promotional scheduling for events, product launches, lifecasting and more! Taweet is focused on promoting the topics of your Future Tweets (FT) up until they occur to create buzz or to share with friends.
Link: http://taweet.com/
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Twitter2gTalk takes your tweets and sets them as your gTalk status/away message.
Updates are currently every 30 mins Tweets that start with ‘@’ will not be sent to gTalk
Link: http://twitter2gtalk.appspot.com
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The Twitter Times is a real-time personalized newspaper generated from your Twitter account
Live Demo: http://twittertim.es/timOReilly
Link: http://twittertim.es/
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Rabr is an advanced and fully functional Twitter web client based on the famous Twitese project.
Live Demo: http://t.zdx.in/ Download: http://rabr.googlecode.com/
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Twitter Lists 2 RSS lets you enter the URL of a public Twitter List and returns an RSS Feed you can insert into your RSS reader of choice.
It’s a clever little tool, particularly for those who aren’t able to log into Twitter that often and enjoy a recap at a leisurely pace.
Link: http://twiterlist2rss.appspot.com/
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Form: http://momb.socio-kybernetics.net/labs/twitter-50
PS: follow us on twitter http://twitter.com/kuapp
The 100 most popular sites mashing up and remixing Twitter as measured by the number of bookmarks at del.icio.us. Currently more than 1,700 sites (in and out of beta) are tracked. This list will be updated weekly.
updated: October 25 2009

twitter (25849 overall)

tweetdeck (7297 overall)
twitterfeed (7128 overall)
wefollow (6707 overall)
twitter-search (6430 [...]

Twitter’s new Lists feature allows anyone to curate the real time web. Listorious makes it easy to find the best lists of Twitter users on any given topic, and for list creator to publicize their lists.
This site was created using new Twitter List API.
Link : http://listorious.com
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