Yes, but most of these projects have been abandoned. GitHub for Mac used a similar project but they've also changed direction. There is just too much "stuff" to reimplement. It is really a job only Apple can do
If you've used both you can tell that UIKit is the version 2 or 3 of AppKit, there are many things where UIKit is pleasant to use and AppKit is irritating for similar things.
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Isn't this part of the reason why there's some effort to port some of the iOS UIKit to OSX? https://github.com/BigZaphod/Chameleon
Yes, but most of these projects have been abandoned. GitHub for Mac used a similar project but they've also changed direction. There is just too much "stuff" to reimplement. It is really a job only Apple can do
If you've used both you can tell that UIKit is the version 2 or 3 of AppKit, there are many things where UIKit is pleasant to use and AppKit is irritating for similar things.