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

Bob McCune's collection of Core Animation demos.

Spring Framework

Code Samples for Animation in iOS talk at NYC iPhone meetup

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

web basic

Vim - the text editor - for Mac OS X

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

Core Animation iOS example code. Lots of it.

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

A programmer-oriented testing framework for Java.

EventMachine: fast, simple event-processing library for Ruby programs

script.aculo.us is an open-source JavaScript framework for visual effects and interface behaviours.