KeyCastr, an open-source keystroke visualizer

Staggeringly powerful macOS desktop automation with Lua

Model framework for Cocoa and Cocoa Touch

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

LuLu is the free macOS firewall

Three20 is an Objective-C library for iPhone developers

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

This framework implements a strict JSON parser and generator in Objective-C.

Desktop WebKit wrapper for HTML/CSS/JS applications.

A similar control to the pull down to refresh control created by atebits in Tweetie 2.

A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS

Official frugal and native macOS Syncthing application bundle

Mac Native Mongodb Client

A gitk clone for OS X

Expressive, flexible, and powerful stylesheets for UIView and friends.

WebKit plug-in to prevent automatic loading of Adobe Flash content

Distributed version control + object persistence framework

Reads an .ichat binary plist file and writes newline-separated JSON to STDOUT

This fork of Three20 is created for GSoC, and the main goal is to add iPad support for Three20. However, it is experimental, so don't use it in your working project right now.