MacOS system extension that allows applications to pass audio to other applications. Soundflower works on macOS Catalina.

A software update framework for macOS

Three20 is an Objective-C library for iPhone developers

Objective-C JSON

Managing windows size and position in OSX

Animate in Xcode without code

Path 2.0 menu using CoreAnimation :)

A utility that reminds your iPhone app's users to review the app.

tap + haiku = tapku, a well crafted open source iOS framework

Core Data code generation

A QuickLook plugin that lets you view plain text files without a file extension

one-stop-shop for all your method swizzling needs

The HTML5 ebook framework to publish interactive books & magazines on iPad & iPhone using simply open web standards

(demo) Recreating the buttonless interaction pattern found in Clear for iPhone app

A calendar component for the iPhone (the UI is designed to match MobileCal)

MongoHub mac native version.

CoverFlow API replacement for the iPhone

[UNMAINTAINED] A better sidebar for Textmate.

Syntax control for the command line

[cocoa] Mac port of sfxr with document support, etc

Cocoa meets WebKit for more rapid UI development

Tomighty for macOS

Teach your computer to take screenshots of your app so you don't have to anymore. Tools to automate making iOS screenshots.

An NSTableView replacement that doesn't suck.

A generic styled view class for rendering simple graphics on the desktop.

A simple twitter client that allows you to authorize with xauth, and post status updates