Bob McCune's collection of Core Animation demos.

Code Samples for Animation in iOS talk at NYC iPhone meetup

Core Animation iOS example code. Lots of it.

A clean and lightweight progress HUD for your iOS app.

A delightful iOS and OS X networking framework

Finance Manager app for iPhone

Three20 is an Objective-C library for iPhone developers

App Sales allows iPhone and Mac App Store developers to download and analyze their daily and weekly sales reports from iTunes Connect.

Tesseract OCR Mac

The Spring Framework

Finance Manager app for iPhone

algorithms and data structure basics

Tesseract OCR Mac

Sudoku solver with OCR capability on iOS (edit: developed for iOS 4 before ARC, some memory reference changes may be required to get the app to make a full run.)

A delightful networking framework for iOS, macOS, watchOS, and tvOS.

A clean and lightweight progress HUD for your iOS and tvOS app.

Bob McCune's collection of Core Animation demos.

Spring Framework

A series of netty tutorials, most of them backing up posts at http://biasedbit.com/

HTTP sniffing and low-level visualisation

Code Samples for Animation in iOS talk at NYC iPhone meetup

implementations of Dijkstra's shunting-yard algorithm for infix notation parsing

web basic

The iReddit iPhone app

Vim - the text editor - for Mac OS X

DEPRECATED: See the canonical repository at @twitter/twitter-text-java

Demonstration of Tesseract OCR on the iPhone. Video: http://www.youtube.com/v/MICew5-nZp4?hl=en_US&fs=1