This is a really nice idea from Maxim Kotliar. It dynamically changes the status bar colour based on the content underneath it. It won't be that useful if you're working with navigation bars, but if you're working with full screen content, you'll want to give this a look.
Marc Palmer with a new framework for helping to separate apps into features. It's not going to be necessary for every app but I can see a place for this kind of approach with larger apps consisting of lots of interconnected features. I'd also recommend listening to this interview on the iDeveloper podcast which helped me understand it much better.
Like Shaps Benkau, I'd also like to see Apple give us a nicer API with type safety to UserDefaults. Until they do, here's an approach so you can do it yourself!
I liked this simple, chainable, animation API from Taiki Suzuki. It's not going to cope with every animation scenario but it does have simplicity on its side and there's some good options in terms of timing functions. The API is clean and it'll save you some time.