Apple finally went ahead and did it!
Today Apple unwrapped their open sourced Swift programming language. Yes, Swift has been around for a while already, but today it was opened up to the community (Engadget link there).
You can find out more at the website but also check out the repositories at GitHub as well. Currently Apple’s GitHub organization houses pretty m much only projects around Swift.
Sadly, on the Linux-side of things, only Ubuntu binaries are available.
So go forth OSS friends and contribute!