DWTweetObjects is a project mainly written in OBJECTIVE-C and C, it's free.
Cocoa objects for Tweets (Twitter) and NSTableView cell
These set of classes is used to help along development of a Cocoa (Mac OS X) Twitter client.
As not much code is available for utilising the data received from Twitter.com on the Mac, I decided to develop a set of classes to use the data for an NSTableView and a set of formatted cells.
Feel free to use the code where you like.