At WWDC in June, Apple announced it would be open-sourcing its Swift programming language by the end of the year. Well, it's the first week of December and Apple kept is promise: Swift is now open source.
Apple introduced the Swift programming language at WWDC in 2014, touting it as the best language going forward for building apps for Apple platforms — which include iOS, OS X, tVOS and watchOS. In some ways, Swift can be seen as a successor to Objective-C.
At WWDC, Apple senior vice president of software engineering Craig Federighi said one of the reasons the company felt it was important to open-source Swift was because of its thought that "the next big programming language" would live on for years to come.
The lack of an open-source license hasn't slowed Swift's adoption — StackOverflow surveys show interest in the language continues to be high — but it has limited it to the Apple community.
Open-sourcing Swift has the potential of making the language take off on other platforms, too.