RestKit is a framework for consuming and modeling RESTful web resources on iOS and OS X

Three20 is an Objective-C library for iPhone developers

iOS and Mac Cocoa library for communicating over USB

Quicksilver Project Source

Programmers' editor for OS X [DEAD PROJECT]

Notational Velocity: modeless, mouseless Mac OS X note-taking application

A simple iPhone TableViewController for adding pull-to-refresh functionality.

gfxCardStatus is an open-source menu bar application that keeps track of which graphics card your unibody, dual-GPU MacBook Pro is using at any given time, and allows you to switch between them on …

Open source release of Canabalt for iOS

A humane JSON Objective-C un-framework. (TouchJSON has been deprecated - see README)

An iOS opensource framework for supporting Drag & Drop within an application and between applications.

Demo of using MKOverlayView in iOS 4.0+ to render custom tile server overlays. (Last updated in 2012, you probably want to look elsewhere for modern code examples.)

A TextMate Plugin that adds native full screen app support for Mac OS X Lion users.

Sample Echoprint song identifier for iOS

Objective-C client library for SimpleGeo

An iOS library for displaying tiled maps with support for custom tile providers

iOS Geometry Library

Interactive map presentation tool for iPad which exports to video

Cocos2D iPhone - built as a static framework

iOS and OS X Cocoa library for communicating over USB and TCP

Official "clone" of TouchJSON from TouchCode

Cocos2D iPhone - built as a static framework

An iOS opensource framework for supporting Drag & Drop within an application and between applications.

Demo of using MKOverlayView (iOS 4.0) to render custom tile server overlays in a native iPhone app.

Quicksilver Mac OS X Project Source

An iOS library for displaying tiled maps with support for custom tile providers

Interactive map presentation tool for iPad which exports to video

iOS Geometry Library

A simple iPhone TableViewController for adding pull-to-refresh functionality.

RestKit is a framework for consuming and modeling restful web resources on OS X and iPhone/iPad