Original Link: https://developer.apple.com/swift/

Swift is an innovative new programming language for Cocoa and Cocoa Touch. Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objective-C.

Download “The Swift Programming Language” from the iBooks Store

I haven’t had a chance to dig into Swift as much as I would like just yet, but it looks like an interesting successor to Objective-C so far…