The Cocotron is an open source project which aims to implement a cross-platform Objective-C API similar to that described by Apple Inc.'s Cocoa documentation. This includes the AppKit, Foundation, Objective-C runtime and support APIs such as CoreGraphics and CoreFoundation.

Cocotron Code

Private API

Any API which is not documented by Apple as part of Foundation, AppKit or CoreGraphics is considered private API regardless of whether it shows up in public headers or not. If you use private API, expect your program to break in the future.