Cocoa Sidebar with Badges.
Joel asked me to revise the Sidebar, allowing to add/remove and do other operation at any time.
I've rewritten all the code of the Sidebar, and I've added a couple of new features, like the default action handler and obviously the ability to add, remove items and badges at any time.
All the past features, like Drag & Drop are still present, but there's something else to do to improve it. If You've suggestions, patches or something else post a comment or send me a mail!
The Source Code is Available Here: Cocoa Sidebar 2 Source Code.
Update 10 March 2008 - Source Updated with Fixes.