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appirater

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

nimbus

The iOS framework whose growth is bounded by O(documentation).

AFNetworking

A delightful iOS and OS X networking framework

BlocksKit

The Objective-C block utilities you always wish you had.

DCIntrospect-ARC

The cool DCIntrospect Debug Tool ARC ready

drupal-ios-sdk

The Drupal iOS iPhone & iPad Software Development Kit provides a full suite of iOS features to natively connect iOS applications to Drupal. Built by Kyle Browning at http://workhabit.com Formerly KBDrupalConnect

DTCoreText

Methods to allow using HTML code with CoreText

DTFoundation

Standard toolset classes and categories

facebook-ios-sdk

Facebook SDK for iOS

FLEX

An in-app debugging and exploration tool for iOS

FXImageView

FXImageView is a class designed to simplify the application of common visual effects such as reflections and drop-shadows to images, and also to help the performance of image loading by handling it on a background thread.

iCarousel

A simple, highly customisable, data-driven 3D carousel for iOS and Mac OS

iso-8601-date-formatter

A Cocoa NSFormatter subclass to convert dates to and from ISO-8601-formatted strings. Supports calendar, week, and ordinal formats.

iVersion

Library for dynamically checking for updates to Mac/iPhone App Store apps from within the application and notifying users about the new release. Can also notify users about new features in the app the first time they launch after an upgrade.

MBProgressHUD

MBProgressHUD, an iOS activity indicator view (official repository)

MMDrawerController

A lightweight, easy to use, Side Drawer Navigation Controller

mopub-ios-sdk

MosaicLayout

MosaicLayout using UICollectionViews

MRProgress

Collection of iOS drop-in components to visualize progress

PDKeychainBindingsController

Mac OSX and iOS Keychain Access patterned after NSUserDefaults.

PureLayout

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

QuickDialog

QuickDialog - Quick and easy dialog screens for iOS

Reachability

ARC and GCD Compatible Reachability Class for iOS and MacOS. Drop in replacement for Apple Reachability

SDWebImage

Asynchronous image downloader with cache support with an UIImageView category

SKBounceAnimation

A CAKeyframeAnimation subclass that lets you quickly and easily set a number of bounces, and start and end values, and creates an animation for you.

SVPullToRefresh

Give pull-to-refresh & infinite scrolling to any UIScrollView with 1 line of code.

TITokenField

An iOS version of the NSTokenField (See To: field in Mail and Messages).

WYPopoverController

WYPopoverController is for the presentation of content in popover on iPhone / iPad devices. Very customizable.

YAML.framework

Proper YAML support for Objective-C. Based on recommended libyaml.

zxing

Official ZXing ("Zebra Crossing") [git svn clone of http://code.google.com/p/zxing]