iOS

• Apple's Dev Center
• Apple's Dev Forums
• Google's Dev Groups
• iOS Reference Guide
• Tutorials
  • Stanford's iPhone Course
  • How to Make iPhone Apps
  • Beginning iPhone Programming
  • AppsAMuck
  • iCodeBlog
  • How to Find Your iPad's UUID

Objective-C

• Overview
• Object-Oriented Programming with Objective-C
• Memory Management Programming Guide
• Objective-C introduction for Java developers
• FAQ from comp.lang.objective-c
• FAQ from StackOverflow

System and Programming Tools

• Xcode
  • Installation Guide
  • Getting Started with iOS development
  • Interface Builder User Guide
  • Stanford's walkthrough of creating a first app
• Subversion (SVN)
  • Xcode Source Management Guide
  • Using SVN
• Web Development Resources
  • HTML
  • CSS
• CSS Zen Garden
• Web Design from Scratch
• OIT Software Library: software available to Duke Students