Apple's programming language is opening itself up to the masses, meaning more apps on more platforms, and more tools in the hands of developers.
Developers can prototype their devices, simulate a full release, then keep the finished products updated through an open source app store.
Microsoft is porting its server-side .NET stack to Linux and Mac OS X, and is making more of that stack available as open source.
Newest release of open source suite comes as LibreOffice now claims 80 million active users around the world.
Q&A: Years ago, Microsoft's CEO described open source as a cancer. Times have changed. Just ask 22-year Redmond veteran and open-source proponent Mark Hill.
Experts caution that the notorious security bug heralds "open season on open source" and will force changes in how open-source code gets vetted as secure.
Microsoft's decision to open-source more of its .Net platform didn't happen overnight, or even in the past few weeks. It was a move years in the making.
What happens when a prime example of the open-source hardware movement locks down its products?
Interest in open-source tooling and infrastructure for big data keeps growing among developers and traditionally proprietary companies.
The storied tech institution launches MITx, an initiative to create an open-source online-learning software platform that can be used by other schools and complement its OpenCourseWare content.