Working with UIImagePickerViewController and Image Manipulation in iOS: A Step-by-Step Guide

Alternative to NSXMLDocument on the iPhone for XSLT purposes

Unlocking Custom Object Serialization with NSKeyedUnarchiver and NSCoding

Creating Custom Keyboards on iOS: A Step-by-Step Guide for Developers

Here's the code with comments:

Communicating with iDevices via C: A Comprehensive Guide

Mastering HTTP Live Streaming for Real-Time Video Playback on iPhone

Debugging and Troubleshooting Zbar SDK on iOS 4.0.1: A Comprehensive Guide

Understanding and Managing NSOperationQueue: The Indirect Way to Cancel Operations

Understanding Flip Page Animation in iOS 5 and Later Platforms vs. Older Platforms