- 75 Essential Tools for iOS Developers
- The iOS Design Cheat Sheet
- ReactiveCocoa ReactiveCocoa (RAC) is an Objective-C framework for Functional Reactive Programming. It provides APIs for composing and transforming streams of values.
- IGHTMLQuery IGHTMLQuery is a lightweight XML/HTML parser for iOS, built on top of libxml. It is inspired by jQuery and nokogiri
- WYPopoverController WYPopoverController is for the presentation of content in popover on iPhone / iPad devices. Very customizable.