Mac app that shows all open files, directories, sockets, pipes and devices in use by all running processes. Nice GUI for lsof.

Easy to use CFNetwork wrapper for HTTP requests, Objective-C, Mac OS X and iPhone

Cocos2d for iOS and OS X, built using Objective-C

Style iOS apps with a stylesheet, similar to CSS

Quicksilver Project Source

Source for many of The Omni Group's frameworks

A fast, simple graph drawing and data plotting app for OS X and iPad.

Cocoa framework for updating OS X apps

CocosBuilder, the visual editor for cocos2d

TextMate plugin (Cocoa) shell for running 'ack'

Push Notification Registration for iOS

An open source implementation of the Fountain screenplay formatting language.

TiVo Show Downloads for MacOS

An EditorConfig plug-in for TextMate

Quicksilver source code

Simple game that demonstrates how to use CocosBuilder

Swift & SocketIO Demo

iOS implementation of the Fizmo Z-machine interpreter