Exercism.io
Marcus Zarra's Core Data Stack
Guy English's Blog Post
Brent Simmons' Blog Post
Wooji Juice Blog Post
Realm.io
Unexpected Thug Life
Parrot drone
Sams Teach Yourself Swift in 24 Hours
NSBrief podcast
Stanford University iOS course - CS193p
Daniel Steinberg's companion book
The Ugly American Learns Swift