Apple's Senior Vice President for Software Engineering Craig Federighi was a guest on John Gruber's The Talk Show podcast recently and gave some insights on Swift in open source. Swift is Apple's unified programming language which it hopes developers will shift to from Objective C. Apple released Swift into open source recently hoping to make it widely available to all developers.
Federighi said that Swift is the most popular language on Github, which is a widely used repository for open source programming and resources. Expected to be the major language for the next 20 years and the lynchpin of Apple's various OS ecosystems, Swift is now also available for Linux where it can be used on servers.
"I think our team is a really seasoned team in the world of developing languages and we know that a language really can’t be developed in a vacuum," Federighi noted. "The first step is you have to crystallize your basic ideas and have a starting point. But we knew we needed feedback then to work toward the language that ultimately Swift has become and will become in the future." For more information on Swift, check this link.
Source: Daring Fireball