Mantle makes it easy to write a simple model layer for your Cocoa or Cocoa Touch application.

mogenerator is a command-line tool that, given an .xcdatamodel file, will generate two classes per entity. The first class, _MyEntity, is intended solely for machine consumption and will be continuously overwritten to stay in sync with your data model. The second class, MyEntity, subclasses _MyEntity, won't ever be overwritten and is a great place to put your custom logic.

AFNetworking is a delightful networking library for iOS and Mac OS X

Generate a constants file by grabbing identifiers from storyboards in a project

ReactiveCocoa (RAC) is an Objective-C framework inspired by Functional Reactive Programming. It provides APIs for composing and transforming streams of values.

Use RBStoryboardLink when you try to split your large storyboard to several one and you still want to glue these storyboard automatically.

This library provides a category for UIImageView with support for remote images coming from the web

CocoaLumberjack is a fast & simple, yet powerful & flexible logging framework for Mac and iOS.