atebits has announced a Mac version of Tweetie, its Twitter client originally produced for the iPhone. The software offers dedicated access to Twitter functions, such as posting tweets or viewing trends and the timeline. The Mac client is said to be a "complete rewrite" however, with a faster core and better support for extensions. The code should eventually become the basis for Tweetie 2.0 on the iPhone.

Features of the Mac client include threaded conversations, search functions with tear-off windows, and the ability to send links from a browser directly to a new tweet composition window. The app runs on Mac OS X 10.5 or later, and can be downloaded for free in an ad-supported version. Users can also currently remove the burden of ads for $15, though the price is expected to rise to $20 after May 4th.