Cocoa Browser Air is a simple to use app that will enable you to browse all Cocoa related APIs of Mac OS X frameworks, such as Core Animation, Core Data, WebKit and so on.
You can browse the brand new iPhone 2.0 API as well. This is the best complement tool for the Cocoa Programming on every platform provided by Apple Inc.
Cocoa Browser Air inherits the sophisticated user interface from Cocoa Browser which was made by Takanori Hoshi, but the source code has been completely rewritten to improve its stability and ease of maintenance.
NOTE: Cocoa Browser Air 4.4 can only be purchased via the Mac App Store (the buy link redirects you to its App Store page). To purchase/download applications via the App Store an Apple account is required.
To access the previous Cocoa Browser Air versions you can go to its developer`s project page HERE. The page provides access to the Cocoa Browser Air 4.2 open source version.