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

Spectacle allows you to organize your windows without using a mouse.

Color framework for Swift & Objective-C (Gradient colors, hexcode support, colors from images & more).

Model framework for Cocoa and Cocoa Touch

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

A software update framework for macOS

The ultimate API for iOS & OS X Auto Layout — impressively simple, immensely powerful. Objective-C and Swift compatible.

Simple, modern, thread-safe key-value observing for iOS and OS X.

Prevents your Mac from going to sleep.

Bolts is a collection of low-level libraries designed to make developing mobile apps easier.

An iOS and macOS audio visualization framework built upon Core Audio useful for anyone doing real-time, low-latency audio processing and visualizations.

PDF Reader Core for iOS

Control the fans of every Intel Mac to make it run cooler

MacOS system extension that allows applications to pass audio to other applications.

A Static Library to be embedded on iOS applications to display pdf documents derived from Fast PDF

Detects the hardware, software and display of the current iOS or Mac OS X device at runtime.

A sample that shows how to move a running Mac application to the /Applications directory

OS X App to edit compiled .car files

A Mac App for finding GIFs

A Hopper plugin for demangle Swift symbols

Animate UIView with 25+ timing functions. (Bounce, elastic, exponential, etc.)

The iOS/OSX system investigator

Create custom appearances to customize your app's look with NSAppearance

Extended UIView for Interface Builder by using IB_DESIGNABLE and IBInspectable.

A Mac App for viewing view-based Snapshot tests