Enhance your app / service with a photo editor. It's fully customizable and SDKs are available for iOS, Android and HTML5.
There have been several great sessions about Swift at this year's WWDC. I'm just going to point out three sessions, but you should absolutely have a look at the others as well. In this session Chris Lattner talks about what's new in Swift.
While the Swift language makes it easy to write software that is incredibly fast and safe by design, Swift being open source means you can use it on an even broader range of platforms, from mobile devices to the desktop and in the cloud. This session gives an overview of available projects at Swift.org and examples of the community in action.
The topic of this session is 'Protocol and Value Oriented Programming in UIKit Apps', which builds on last year's very successful session about the same topic.
Florian Kugler and Chris Eidhof explore an alternative approach to building the networking layer of an app in their new weekly coding session.
Swift Playgrounds is a revolutionary new app for iPad that makes learning Swift interactive and fun.
Cleanse is a framework for lightweight dependency injection with Swift, created by the folks at Square.
iOS 10 also brings us a new way to do interruptible and reversible animations. This article by Roy Marmelstein explores the basics.
Ayaka Nonaka writes about her favorite Swift 3.0 features.
Square's SuperDelegate turns UIApplicationDelegate into a clean application delegate API that is stable across all versions of iOS 8 and iOS 9.
Swift 3.0 brings quite a few changes to the Swift Standard Library. This official guide describes all the changes.
As most of you probably already know, Apple has added support for third party Siri integration. This tutorial by Jameson Quave explains the basics using Swift.