How operations and queues work in Swift
a task queue with local persistent by Swift 2.0
A Generic Priority Queue in Pure Swift
Simple, reliable, background processing for Swift
A Task Queue Class developed in Swift (by Marin Todorov)
Queuer is a queue manager, built on top of OperationQueue and Dispatch (aka GCD).
Syntactic sugar in Swift for asynchronous dispatches in Grand Central Dispatch
Algorithms and data structures in Swift, with explanations!