An open source iOS framework for GPU-based image and video processing

Staggeringly powerful macOS desktop automation with Lua

LuLu is the free open-source macOS firewall

The Git interface you've been missing all your life has finally arrived.

A software update framework for macOS

iOS Objective-C headers as derived from runtime introspection

Three20 is an Objective-C library for iPhone developers

Send User Notifications on macOS from the command-line.

An extension for Apple's xcodebuild that makes it easier to test iOS and macOS apps.

Prevents your Mac from going to sleep.

OS X menubar status indicator

Objective-C Runtime Browser, for Mac OS X and iOS

Install and debug iPhone apps from the command line, without using Xcode

Source for many of The Omni Group's frameworks

Textual is an IRC client for OS X

GitHub API client for Objective-C

Drop in sharing features for all iPhone and iPad apps

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

ObjC wrapper for ObjC runtime API

Create UIImage / NSImage instances with NSString and ASCII art

Open source iPhone code

Sample Code

An easy way to get Twitter authenticating with OAuth on iPhone

A collection of helpers (categories) we've written for iOS and OS X, full with convenience methods to make them easier and more useful. [tags:cocoa,objective-c,ios,mac]

8x8 monochrome bitmap fonts for rendering

Source List control for the Mac

Small command-line program for OS X that moves files or folders to the trash.

EGODatabase is a thread-safe Objective-C SQLite wrapper with full support for asynchronous SQLite calls as well as built in NSOperationQueue support.

NatsuLiphone - The twitter client for iPhone / iPod touch