Everyone has their own Auto Layout helpers. Here’s a list of those I know of so far…

• marcoarment/CompactConstraint: “Simple NSLayoutConstraint expression parser for more readable autolayout code.”
• robb/Cartography: DSL for “Declarative Auto Layout in Swift”
• Masonry/Snap: “Swift port of Masonry Auto Layout DSL”
• floriankugler/FLKAutoLayout: “UIView category which makes it easy to create layout constraints in code”
• indragiek/SwiftAutoLayout: “Tiny Swift DSL for Autolayout”
• smileyborg/PureLayout: “The ultimate API for iOS & OS X Auto Layout”

And here are some entirely alternate layout systems:

• ReactiveCocoa/ReactiveCocoaLayout: “Reactive layout framework built on top of ReactiveCocoa” (as you know, I ❤️ reactive)
• joshaber/SwiftBox: “Flexbox in Swift, using Facebook’s css-layout”