Manage your Twitter account from a desktop application. Read editor's review...

Twhirl is a desktop Twitter client, based on the Adobe AIR platform. It connects to multiple Twitter and Friendfeed, Seesmic Video, and laconi.ca accounts, pops up notifications on new tweets, shortens long URLs (using digg.com, bit.ly, snurl, twurl or is.gd), cross-posts updates to Jaiku and many other sites like Facebook, MySpace, LinkedIn and more via Ping.fm, posts images to yfrog, searches tweets using Twitter Search and TweetScan, and follows topics in near-real time with saved searches. It also automatically finds tweets mentioning your @username, and records a video on Seesmic Video to share on Twitter immediately, gets your Seesmic Video updates in real-time using XMPP, and includes English spell checking.

Version 0.9.4 includes:

improved API request usage for Twitter
sharing images via yfrog
tweets posted to Twitter appear as "via Seesmic" now

Operating systems:
Windows 7, Windows Vista, Windows XP

Additional requirements:
Windows XP/Vista/7 or Mac OS X, Adobe AIR