Ry’s Objective-C Tutorial : This tutorial is the place to learn the Objective-C programming language. It’s designed to serve as both a concise quick-reference and a comprehensive introduction for newcomers to the language. A familiarity with basic programming concepts like variables, functions, and objects is recommended, but not strictly required.
awesome-ios : A curated list of awesome iOS frameworks, libraries, tutorials, plugins Xcode, components and much more. The list is divided into categories such as Frameworks, Components, Testing and others, open source projects, free and paid services.
VPNOn : This App installs a Today Widget into Notification Center which make it possible to turn on a VPN in about 3 seconds(depends on the connection speed). Furthermore, by turning on On Demand feature, the VPN could be automatically connected when you visit any domain specified in this App.
iOS-Developer-and-Designer-Interview-Questions : A small guide to help those looking to hire a developer or designer for iOS work. It can also be a great self-test if you're looking to keep current or practice for your own interview.
app-launch-guide : This aims to be an indie dev's definitive guide to building and launching your app, including pre-launch, marketing, building, QA, buzz building, and launch.