twhirl is a desktop client for the popular microblogging platform Twitter that builds on the very cool Adobe AIR runtime. AIR allows desktop software development using popular web techniques like XHTML/CSS or Flash/Flex. twhirl requires the most recent version of AIR (beta 3) to be installed on the client computer.
There were different reasons for me to start developing twhirl. First of all, I liked twitter, but using the website didn't feel comfortable. Second, I wanted to get my hands on a "real" AIR project, testing it in and out and evaluating it for future uses. Third, I had some spare time to do some fun stuff.
The decision to go the Flex way was easily made. I do XHTML/CSS every day, but I had very few experiences in Flex and ActionScript programming. So I thought this was a good chance to improve these.

twhirl is a Twitter client, written in Adobe AIR, that enables you to manage multiple Twitter accounts from your desktop. You can view and post tweets (with spell checking), read direct messages, get notified of new messages, manage your followers and more. The program also allows you to post images via TwitPic and can automatically shorten your URLs via a variety of services. Other features include the ability to search tweets using Twitter Search and TweetScan, and follow topics in near-real time with saved searches, as well as support for cross-posting to Jaiku, Facebook, MySpace, LinkedIn and other sites. twhirl supports multiple Twitter accounts and also laconi.ca, Friendfeed and Seesmic accounts.

Some of twhirl's features:
* runs on both Windows (2000/XP/Vista) and Mac OSX
* connects to multiple Twitter, laconi.ca, Friendfeed and Seesmic accounts
* displays notifications for new messages
* shorten long URLs (using digg.com, bit.ly, snurl, twurl or is.gd)
* cross-post your updates to Jaiku and many other sites like Facebook, MySpace, LinkedIn and more via Ping.fm
* post images to TwitPic
* search tweets using Twitter Search and TweetScan, and follow topics in near-real time with saved searches
* automatically find tweets mentioning your @username
* record a video on Seesmic, and share it on twitter immediately
* get your seesmic updates in real-time using XMPP
* English spell checking

The license of this software is Freeware, you can free download and free use this social networking software.