JSON! Pure Swift, failure driven, inferred but unambiguous, with powerful but optional operators.
Memory warning notification that works on iOS and Mac.
Respond to application open URL event on iOS and Mac without owning/muddying the app delegate. Easy. Decoupled.
Objective-C macro to wrap enum defines – generates inline function to lookup string/name for enum value.
Easily and (thread/memory) safely consume global OS X multitouch (trackpad, Magic Mouse) events.
Data structure for storing/enumerating SEL –> nil-able object/pointer relationships.
Obj-C macros/functions (mostly for debugging) for applying runtime type safety.
Adds choice to have particular NSImage draw in inverted colors when OS X is in the new Yosemite "dark mode."
Convenience support for unmanaged pointers as keys, nilable objects as value.
NSMutableURLRequest category to allow for easy HMAC signing.
A few helpful additions to, and macros related to NSPointerArray (including getting an NSPointerArray from a C function or Objective-C method variable args pointer).
ReactiveCocoa (RAC) is a Cocoa framework built on top of ReactiveSwift. It provides APIs for using ReactiveSwift with Apple's Cocoa frameworks.
Set M5FillFrameFontScale and M5FillFrameHeightOnly runtime attributes on UILabels or UIButtons to have their text fill/fit to their frame.