Apple Releases Swift as Open Source

Apple has announced that its Swift programming language is now open source.
As an open source language, the broad community of talented developers — from app developers to educational institutions to enterprises — can contribute to new Swift features and optimizations and help bring Swift to new computing platforms. Introduced in 2014, Swift is the fastest growing programming language in history and combines the performance and efficiency of compiled languages with the simplicity and interactivity of popular scripting languages.

Apple also launched the Swift.org website with detailed information about Swift open source, including technical documentation, community resources and links to download the Swift source code.
Apple Releases Swift as Open Source