iOS-app template with lots of common tasks solved
Android library for implementing the action bar design pattern using the native ActionBar on 3.0+ and a custom implementation on pre-3.0 through a single API and theme.
GreenDroid is a development library for the Android platform. It makes UI developments easier and consistent through your applications.
A simple iPhone forms library
High-performance iOS gridview.
tap + haiku = tapku, a well crafted open source iOS framework for iPhone & iPad
A delightful iOS networking library with NSOperations and block-based callbacks
iPhone utilities mostly for Core Animation
Open source code for the idevrecipes.com blog
An iBooks-like page-turning interface for iPhone and iPad apps using only public APIs.
Drop in classes for adding a info panel (or error panel) like TweetBot
Magazine Style View/Layout like Flipboard
MBProgressHUD, an iOS activity indicator view (official repository)
Core Animation based UI framework for Mac
iOS Messages.app style table view controller
A subclass of UITextView that allow a placeholder
HMGLTransitions is set of classes which can animate transition between two UIViews, or presentation / dismissing of UIViewControllers.
Stylish and animated tab view for iOS rendered entirely using core graphics.
Easy way to handle UIPopoverController, UIActionSheet and UIAlertView for iOS
Cool, glassy iOS buttons with only one color to set.
A drop-in universal solution for moving text fields out of the way of the keyboard in iOS
A flexible Tab Bar implementation for iPhone and iPad
The Objective-C block utilities you always wish you had.
UIAlertView drop-in replacement. Supports stacked buttons, input fields, user-configurable size, and more.
QuickDialog - Quick and easy dialog screens for iOS
Allows you to swipe a UITableViewCell and reveal a back view, functions like cells in the "Twitter" app.
A collection of iOS classes for making life easier
A custom mac-like color well for iPhone
An iOS version of the NSTokenField (See To: field in Mail and Messages).