iTerm2 is a terminal emulator for Mac OS X that does amazing things.

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

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

A drop-in replacement for UILabel that supports attributes, data detectors, links, and more

OS X menubar status indicator

A small, lightweight, embeddable HTTP server for Mac OS X or iOS applications

Managing windows size and position in OSX

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

Desktop WebKit wrapper for HTML/CSS/JS applications.

A Mac PrefPane to manage all your Homebrew-installed services

Quicksilver Project Source

MBProgressHUD, an iOS activity indicator view

A gitk clone for OS X

Experimental fork of Pieter's nice git GUI for OS X. Includes: sidebar, fetch, pull, push, add remote, merge, cherry-pick, rebase, clone, clone to. Mac OS X 10.5+ (see wiki for screenshot)

Open source map library for iOS

(demo) A carefully implemented iOS objective-c library to mimic the sidebar layout of the new Facebook app and Path 2.0 app.

GitX (L) - A gitk clone for OS X

TextMate plugin (Cocoa) shell for running 'ack'

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

Objective-C interactive regular expression validator and tester for OS X.

ProjectPlus is a plug-in for TextMate which extends the functionality of project-related features.

Webarchiver allows you to create Safari .webarchive files from the command line. This project was featured on the Github blog in December 2008 👍

Minimal, robust iTunes scrobbling

Quicksilver Plugins Archive - please do not fork this. Fork individual plugin repos insteads

A contextual FTP, SFTP and Amazon S3 uploader for Mac OS X.

Unofficial Google Wave Notifier for mac

Allow an external editor for NSTextView and WebView

GitX (L) - A gitk clone for OS X