Swift is a language entirely in the control of Apple, mainly targeting Apples platforms. With little to no community engagement.
Bonjour is not really cross platform, and not really open source either as it has lots of strings attached to the license and terms one can use it under.
(I wouldn't say that Apple has done "nothing" -- but to credit them for doing much is also a stretch)
And I think CSS animations and transforms mostly came out of Apple; at any rate, they're very similar to the animations and transforms in UIKit that originally came from NeXT.
Entire timeline of JavaScript engines.
https://egbert.net/blog/articles/javascript-jit-engines-time...
or:
I didn't include Firefox because it's just an NCSA Mosaic fork, not theirs.
The point being, whoever does most of the work and maintenance owns something, not who came up with some early predecessor.
They’re contributing to a ton of OSS that’s NIH:
https://opensource.apple.com/projects/
K8s, spark, cassandra, netty, zookeeper, solr, containerd
Did Nickel exist in 2018? (Someone here said that Pkl did.)
Cups - https://en.wikipedia.org/wiki/CUPS
Swift - https://en.wikipedia.org/wiki/Swift_(programming_language)
Zeroconf - https://en.wikipedia.org/wiki/Bonjour_(software)
I think they're bad, opaque opensource maintainers, but they did release some popular things that have communities on other systems.
I do wish they just contributed to nickel or something else though rather than doing their NIH as usual.